{"id":"EUVD-2026-50568","revision":null,"records":[{"revision":"d2e7604d621249ccb97aa0a01247d0d6","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-15157","aliases":[],"title":"undici vulnerable to CRLF Injection via blob-like body 'type' property","description":"undici does not validate the type property of a duck-typed blob-like request body before using it as the Content-Type header on the HTTP/1.1 dispatcher. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, an application that passes a hand-rolled blob-like body (via request, stream, pipeline, or dispatch) whose type is derived from untrusted input allows an attacker to inject CRLF sequences and append arbitrary HTTP headers, potentially smuggling a second request past the upstream. Native Blob objects are safe because their constructor strips CRLF from the type, and fetch is unaffected because it validates headers, but ecosystem libraries that build duck-typed blob shapes from user input can reach the vulnerable path. This is the same defect class as CVE-2022-35948 and CVE-2026-1527, on a header sink that the earlier fixes did not cover. The issue is fixed in undici 6.28.0, 7.29.0, and 8.9.0.","state":0,"publishedAt":"2026-07-29T21:17:44.74+00:00","modifiedAt":"2026-07-30T15:18:02.97+00:00","affected":[{"ecosystem":"Vendor product","name":"undici","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"undici\",\n                    \"product\": \"undici\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.28.0\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"6.28.0\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\",\n                            \"version\": \"7.0.0\",\n                            \"lessThan\": \"7.29.0\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"7.29.0\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\",\n                            \"version\": \"8.0.0\",\n                            \"lessThan\": \"8.9.0\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"8.9.0\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:npm/undici\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","score":4.2,"severity":"MEDIUM"}],"references":["https://github.com/nodejs/undici/security/advisories/GHSA-m8rv-5g2x-5cg5","https://cna.openjsf.org/security-advisories.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-15157","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-15157","identifiers":["CVE-2026-15157"]},"retained":false,"historicalAffected":[]},{"revision":"cd874b920d164fcd943bd74284a71a94","observedAt":"2026-11-15T07:32:46.945+00:00","statement":{"source":"euvd","id":"EUVD-2026-50568","aliases":["CVE-2026-15157","GHSA-m8rv-5g2x-5cg5"],"title":"undici does not validate the type property of a duck-typed blob-like request body before using it as the Content-Type header on the HTTP/1.1 dispatcher. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.…","description":"undici does not validate the type property of a duck-typed blob-like request body before using it as the Content-Type header on the HTTP/1.1 dispatcher. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, an application that passes a hand-rolled blob-like body (via request, stream, pipeline, or dispatch) whose type is derived from untrusted input allows an attacker to inject CRLF sequences and append arbitrary HTTP headers, potentially smuggling a second request past the upstream. Native Blob objects are safe because their constructor strips CRLF from the type, and fetch is unaffected because it validates headers, but ecosystem libraries that build duck-typed blob shapes from user input can reach the vulnerable path. This is the same defect class as CVE-2022-35948 and CVE-2026-1527, on a header sink that the earlier fixes did not cover. The issue is fixed in undici 6.28.0, 7.29.0, and 8.9.0.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","score":4.2,"severity":null}],"references":["https://github.com/nodejs/undici/security/advisories/GHSA-m8rv-5g2x-5cg5","https://cna.openjsf.org/security-advisories.html"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-50568","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jul 29, 2026, 9:17:44 PM","dateUpdated":"Jul 30, 2026, 3:18:02 PM"},"relatedAdvisories":[{"id":"WID-SEC-W-2026-3621","title":"IBM App Connect Enterprise: Mehrere Schwachstellen","vulnerabilityIds":["CVE-2022-35948","CVE-2026-13697","CVE-2026-14643","CVE-2026-15157","CVE-2026-1527","CVE-2026-16728","CVE-2026-16729","CVE-2026-59871","CVE-2026-59873","CVE-2026-59874","CVE-2026-59875","CVE-2026-92595","CVE-2026-92596","CVE-2026-92597","CVE-2026-92598","CVE-2026-9678"]},{"id":"SUSE-SU-2026:4248-1","title":"Security update for nodejs18","vulnerabilityIds":["CVE-2025-22150","CVE-2025-23166","CVE-2025-23167","CVE-2025-55131","CVE-2025-59465","CVE-2025-59466","CVE-2025-62408","CVE-2026-11525","CVE-2026-12151","CVE-2026-15157","CVE-2026-16728","CVE-2026-16729","CVE-2026-21637","CVE-2026-21710","CVE-2026-21713","CVE-2026-21714","CVE-2026-21717","CVE-2026-22036","CVE-2026-27135","CVE-2026-48618","CVE-2026-48619","CVE-2026-48928","CVE-2026-48930","CVE-2026-48931","CVE-2026-48933","CVE-2026-48934","CVE-2026-48935","CVE-2026-48937","CVE-2026-56846","CVE-2026-56848","CVE-2026-56850","CVE-2026-58040","CVE-2026-58042","CVE-2026-58043","CVE-2026-58044","CVE-2026-58045","CVE-2026-6733","CVE-2026-9679"]},{"id":"msrc_CVE-2026-15157","title":"undici vulnerable to CRLF Injection via blob-like body 'type' property","vulnerabilityIds":["CVE-2026-15157"]},{"id":"RHSA-2026:48537","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","vulnerabilityIds":["CVE-2026-13697","CVE-2026-14643","CVE-2026-15157","CVE-2026-16728","CVE-2026-16729","CVE-2026-56846","CVE-2026-56847","CVE-2026-56850","CVE-2026-58039","CVE-2026-58040","CVE-2026-58041","CVE-2026-58042","CVE-2026-58043","CVE-2026-58044","CVE-2026-58045"]},{"id":"WID-SEC-W-2026-3596","title":"IBM App Connect Enterprise: Mehrere Schwachstellen","vulnerabilityIds":["CVE-2022-35948","CVE-2026-13149","CVE-2026-14257","CVE-2026-15157","CVE-2026-1527","CVE-2026-16728","CVE-2026-16729","CVE-2026-18149","CVE-2026-18540","CVE-2026-19534","CVE-2026-2391","CVE-2026-45820","CVE-2026-54272","CVE-2026-63670","CVE-2026-67213","CVE-2026-67214","CVE-2026-69152","CVE-2026-69192","CVE-2026-69198","CVE-2026-73566","CVE-2026-73646","CVE-2026-77037","CVE-2026-77063","CVE-2026-77078","CVE-2026-82333","CVE-2026-82417","CVE-2026-82562","CVE-2026-83605","CVE-2026-83606","CVE-2026-83607","CVE-2026-83608","CVE-2026-83609","CVE-2026-83610","CVE-2026-83611","CVE-2026-83612","CVE-2026-83613","CVE-2026-83614","CVE-2026-83615","CVE-2026-83616","CVE-2026-83618","CVE-2026-83619","CVE-2026-84292","CVE-2026-84371","CVE-2026-84375","CVE-2026-84890","CVE-2026-84933","CVE-2026-84947","CVE-2026-84961","CVE-2026-85008","CVE-2026-85014","CVE-2026-85024","CVE-2026-85152"]},{"id":"RHSA-2026:48273","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","vulnerabilityIds":["CVE-2026-13697","CVE-2026-14643","CVE-2026-15157","CVE-2026-16728","CVE-2026-16729","CVE-2026-56847","CVE-2026-56850","CVE-2026-58039","CVE-2026-58040","CVE-2026-58043"]}],"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-2026-50568","identifiers":["EUVD-2026-50568","CVE-2026-15157","GHSA-m8rv-5g2x-5cg5"]},"retained":false,"historicalAffected":[]},{"revision":"8648b3bc012e427fb501f238bb2f454a","observedAt":"2026-10-25T05:17:25.909+00:00","statement":{"source":"nvd","id":"CVE-2026-15157","aliases":[],"title":"undici does not validate the type property of a duck-typed blob-like request body before using it as the Content-Type header on the HTTP/1.1 dispatcher. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.…","description":"undici does not validate the type property of a duck-typed blob-like request body before using it as the Content-Type header on the HTTP/1.1 dispatcher. In undici before 6.28.0, from 7.0.0 up to before 7.29.0, and from 8.0.0 up to before 8.9.0, an application that passes a hand-rolled blob-like body (via request, stream, pipeline, or dispatch) whose type is derived from untrusted input allows an attacker to inject CRLF sequences and append arbitrary HTTP headers, potentially smuggling a second request past the upstream. Native Blob objects are safe because their constructor strips CRLF from the type, and fetch is unaffected because it validates headers, but ecosystem libraries that build duck-typed blob shapes from user input can reach the vulnerable path. This is the same defect class as CVE-2022-35948 and CVE-2026-1527, on a header sink that the earlier fixes did not cover. The issue is fixed in undici 6.28.0, 7.29.0, and 8.9.0.","state":0,"publishedAt":"2026-07-29T22:16:52.463+00:00","modifiedAt":"2026-08-04T15:41:50.45+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · ce714d77-add3-4f53-aff5-83d477b104bb · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","score":4.2,"severity":"MEDIUM"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","score":5.4,"severity":"MEDIUM"}],"references":["https://cna.openjsf.org/security-advisories.html","https://github.com/nodejs/undici/security/advisories/GHSA-m8rv-5g2x-5cg5"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-15157","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-93"],"productCriteria":["cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-07-29T22:16:52.463","lastModified":"2026-08-04T15:41:50.450"},"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-2026-15157","identifiers":["CVE-2026-15157"]},"retained":false,"historicalAffected":[]},{"revision":"45783927d8134fa8805e236d55c29609","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-m8rv-5g2x-5cg5","aliases":["CVE-2026-15157"],"title":"undici vulnerable to CRLF Injection via blob-like body 'type' property","description":"### Impact\n\nWhen an application passes a duck-typed blob-like body to undici's HTTP/1.1 dispatcher (via `request()`, `stream()`, `pipeline()`, or `dispatch()`) with a `.type` derived from untrusted input, an attacker can inject CRLF sequences (`\\r\\n`) to append arbitrary HTTP headers and potentially smuggle a second request past the upstream.\n\nThe vulnerable branch in `lib/dispatcher/client-h1.js` pushes `body.type` directly into the outgoing headers with no validation, while every other header path in undici goes through `isValidHeaderValue()`:\n\n```javascript\n} else if (util.isBlobLike(body) && request.contentType == null && body.type) {\n  headers.push('content-type', body.type)  // bypasses isValidHeaderValue()\n}\n```\n\nThe bug requires a hand-rolled duck-typed blob object or a Blob subclass with a controlled `.type`. Native `Blob` is safe because its constructor strips CRLF from `.type`. `fetch()` is unaffected because it validates via the `Headers` class. Ecosystem consumers that build duck-typed blob shapes from user input include `form-data-encoder`, `formdata-polyfill`, and `formdata-node`.\n\nSame defect class as `CVE-2022-35948` (explicit `content-type` sink, fixed in undici 5.8.2) and `CVE-2026-1527` (`upgrade` option sink, fixed in 6.24.0 / 7.24.0), both closed by adding `isValidHeaderValue()` on their respective sinks. This branch was missed.\n\n### Patches\n\nPatched in undici v6.28.0, v7.29.0, and v8.9.0. Users should upgrade to one of these versions or later.\n\n### Workarounds\n\n- Set an explicit, validated `content-type` header on the request options (skips the vulnerable branch).\n- Use a native `Blob` (or `fetch-blob`) instead of a hand-rolled duck-typed object.\n- Reject control characters in the MIME type before assigning it to `.type`.\n- Use `fetch()` instead of the non-`fetch` APIs.","state":0,"publishedAt":"2026-08-03T19:33:53+00:00","modifiedAt":"2026-09-10T03:51:14.2819254+00:00","affected":[{"ecosystem":"npm","name":"undici","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"6.28.0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"undici","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"7.0.0"},{"kind":"fixed","version":"7.29.0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"undici","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"8.0.0"},{"kind":"fixed","version":"8.9.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/nodejs/undici/security/advisories/GHSA-m8rv-5g2x-5cg5","https://nvd.nist.gov/vuln/detail/CVE-2026-15157","https://github.com/nodejs/undici/commit/33928bc24f742ea8422ed90d17f2e0cc83e4d09d","https://github.com/nodejs/undici/commit/740a0b7c173cb4a83a5b693e96e8f3a116cfc400","https://github.com/nodejs/undici/commit/7d3cf924c262c486bc77f951348f4e5c847b7b42","https://cna.openjsf.org/security-advisories.html","https://github.com/nodejs/undici","https://github.com/nodejs/undici/releases/tag/v6.28.0","https://github.com/nodejs/undici/releases/tag/v7.29.0","https://github.com/nodejs/undici/releases/tag/v8.9.0"],"sourceUrl":"https://github.com/advisories/GHSA-m8rv-5g2x-5cg5","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-m8rv-5g2x-5cg5","identifiers":["GHSA-m8rv-5g2x-5cg5","CVE-2026-15157"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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