{"id":"EUVD-2026-117786","revision":null,"records":[{"revision":"e29274213d0f4aa0987230f5a81b854f","observedAt":"2026-11-05T21:36:21.359+00:00","statement":{"source":"cve-program","id":"CVE-2026-111753","aliases":[],"title":"Angular: XSRF Token Leakage via URL Parsing Discrepancy in Angular HTTP Client (Incomplete fix for CVE-2025-66035)","description":"Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.34 and 21.0.3, the @angular/common HttpClient function xsrfInterceptorFn uses a regular expression that does not normalize request URLs in the same way as the browser's WHATWG URL parser. With XSRF protection enabled, a mutating HTTP request to an attacker-controlled URL containing backslashes, stripped control characters or spaces, or removable ASCII whitespace can be misclassified as relative and same-origin, causing the interceptor to attach the X-XSRF-TOKEN header before the browser dispatches the request to a cross-origin host. With permissive CORS handling for the custom header, the attacker can obtain the victim's XSRF token and use it to perform cross-site request forgery against the victim session. This issue is fixed in versions 20.3.34 and 21.0.3.","state":0,"publishedAt":"2026-11-05T20:25:07.322+00:00","modifiedAt":"2026-11-05T20:25:07.322+00:00","affected":[{"ecosystem":"Vendor product","name":"angular","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"angular\",\n                    \"product\": \"angular\",\n                    \"versions\": [\n                        {\n                            \"version\": \"<= 19.2.25\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 20.0.0, < 20.3.34\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 21.0.0, < 21.0.3\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/angular/angular/security/advisories/GHSA-jfgx-762w-99vr","https://github.com/angular/angular/issues/71294","https://github.com/angular/angular/pull/65683","https://github.com/angular/angular/pull/71295","https://github.com/angular/angular/commit/20474d3f0fd7c64071add6e84acf720627e5c19b","https://github.com/angular/angular/commit/933ce817d53e25926844fa56af8230816763d08e","https://github.com/angular/angular/releases/tag/21.0.3","https://github.com/angular/angular/releases/tag/v20.3.34"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111753","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-111753","identifiers":["CVE-2026-111753"]},"retained":false,"historicalAffected":[]},{"revision":"58d661239f4a4e5fae05804c578193fd","observedAt":"2026-11-07T04:32:44.085+00:00","statement":{"source":"euvd","id":"EUVD-2026-117786","aliases":["CVE-2026-111753","GHSA-jfgx-762w-99vr"],"title":"Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.34 and 21.0.3, the @angular/common HttpClient function xsrfInterceptorFn uses a regular expres…","description":"Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.34 and 21.0.3, the @angular/common HttpClient function xsrfInterceptorFn uses a regular expression that does not normalize request URLs in the same way as the browser's WHATWG URL parser. With XSRF protection enabled, a mutating HTTP request to an attacker-controlled URL containing backslashes, stripped control characters or spaces, or removable ASCII whitespace can be misclassified as relative and same-origin, causing the interceptor to attach the X-XSRF-TOKEN header before the browser dispatches the request to a cross-origin host. With permissive CORS handling for the custom header, the attacker can obtain the victim's XSRF token and use it to perform cross-site request forgery against the victim session. This issue is fixed in versions 20.3.34 and 21.0.3.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":5.9,"severity":null}],"references":["https://github.com/angular/angular/security/advisories/GHSA-jfgx-762w-99vr","https://github.com/angular/angular/issues/71294","https://github.com/angular/angular/pull/65683","https://github.com/angular/angular/pull/71295","https://github.com/angular/angular/commit/20474d3f0fd7c64071add6e84acf720627e5c19b","https://github.com/angular/angular/commit/933ce817d53e25926844fa56af8230816763d08e","https://github.com/angular/angular/releases/tag/21.0.3","https://github.com/angular/angular/releases/tag/v20.3.34"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-117786","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Nov 5, 2026, 8:25:07 PM","dateUpdated":"Nov 5, 2026, 8:25:07 PM"},"relatedAdvisories":[],"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-2026-117786","identifiers":["EUVD-2026-117786","CVE-2026-111753","GHSA-jfgx-762w-99vr"]},"retained":false,"historicalAffected":[]},{"revision":"fadc913be6e745089cc071ed89331298","observedAt":"2026-11-06T09:36:27.137+00:00","statement":{"source":"nvd","id":"CVE-2026-111753","aliases":[],"title":"Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.34 and 21.0.3, the @angular/common HttpClient function xsrfInterceptorFn uses a regular expres…","description":"Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.34 and 21.0.3, the @angular/common HttpClient function xsrfInterceptorFn uses a regular expression that does not normalize request URLs in the same way as the browser's WHATWG URL parser. With XSRF protection enabled, a mutating HTTP request to an attacker-controlled URL containing backslashes, stripped control characters or spaces, or removable ASCII whitespace can be misclassified as relative and same-origin, causing the interceptor to attach the X-XSRF-TOKEN header before the browser dispatches the request to a cross-origin host. With permissive CORS handling for the custom header, the attacker can obtain the victim's XSRF token and use it to perform cross-site request forgery against the victim session. This issue is fixed in versions 20.3.34 and 21.0.3.","state":0,"publishedAt":"2026-11-05T21:18:35.8+00:00","modifiedAt":"2026-11-05T21:18:35.8+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/angular/angular/commit/20474d3f0fd7c64071add6e84acf720627e5c19b","https://github.com/angular/angular/commit/933ce817d53e25926844fa56af8230816763d08e","https://github.com/angular/angular/issues/71294","https://github.com/angular/angular/pull/65683","https://github.com/angular/angular/pull/71295","https://github.com/angular/angular/releases/tag/21.0.3","https://github.com/angular/angular/releases/tag/v20.3.34","https://github.com/angular/angular/security/advisories/GHSA-jfgx-762w-99vr"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-111753","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Received","weaknesses":["CWE-201","CWE-359"],"productCriteria":[],"sourceDates":{"published":"2026-11-05T21:18:35.800","lastModified":"2026-11-05T21:18:35.800"},"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-2026-111753","identifiers":["CVE-2026-111753"]},"retained":false,"historicalAffected":[]},{"revision":"35268cfdd16e4aac95eab9dd17a355a9","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-jfgx-762w-99vr","aliases":["CVE-2026-111753"],"title":"@angular/common: XSRF Token Leakage via URL Parsing Discrepancy in Angular HTTP Client (Incomplete fix for CVE-2025-66035)","description":"An incomplete fix for [GHSA-58c5-g7wp-6w37](https://github.com/angular/angular/security/advisories/GHSA-58c5-g7wp-6w37) (`CVE-2025-66035`) in `@angular/common`'s HTTP Client (`HttpClient`) allows Cross-Site Request Forgery (XSRF) tokens to be leaked to attacker-controlled cross-origin domains when requests use URLs that exploit parsing discrepancies between regular expressions and the browser's WHATWG URL parser.\n\n### Technical Description\n\nTo address `CVE-2025-66035`, `xsrfInterceptorFn` introduced a regular expression (`const ABSOLUTE_URL_REGEX = /^(?:https?:)?\\/\\//i`) to detect and skip absolute and protocol-relative URLs before attaching the `X-XSRF-TOKEN` header.\n\nHowever, browsers resolve request URLs passed to `fetch()` and `XMLHttpRequest.open()` using the **WHATWG URL parser**. For `http:` and `https:` schemes, the WHATWG URL standard performs several normalizations prior to resolving the authority/origin:\n* Backslashes (`\\`) are treated as forward slashes (`/`) — e.g., `/\\evil.example/x`, `\\\\evil.example/x`, `\\/evil.example/x`, `https:\\\\evil.example/x`, `https:/\\evil.example/x`.\n* Leading and trailing C0 control characters and spaces (`<= 0x20`) are stripped — e.g., `' //evil.example/x'`, `'\\0//evil.example/x'`, `'\\x1f//evil.example/x'`.\n* ASCII tab (`\\t`), newline (`\\n`), and carriage return (`\\r`) characters are removed anywhere in the input — e.g., `'/\\t/evil.example/x'`, `'/\\n/evil.example/x'`, `'htt\\tps://evil.example/x'`.\n\nBecause these URLs do not match `/^(?:https?:)?\\/\\//i`, `xsrfInterceptorFn` treats them as relative same-origin URLs and attaches the `X-XSRF-TOKEN` header, while the browser resolves and dispatches the request to the cross-origin host (`evil.example`).\n\nNote: Angular `21.0.3+` and `22.x` replaced the regular expression with a WHATWG `new URL(req.url, locationOrigin)` origin comparison in [#65683](https://github.com/angular/angular/pull/65683) and were already unaffected. However, the `20.3.x` LTS branch retained the regular expression until `20.3.34`.\n\n### Impact\n\nThe token leakage bypasses Angular's built-in XSRF protection on affected versions, allowing an attacker to capture the user's valid `X-XSRF-TOKEN` header if their server permits the request and custom header via CORS. Once obtained, the attacker can perform Cross-Site Request Forgery (CSRF) attacks against the victim user's session.\n\n### Attack Preconditions\n\n1. The victim's Angular application must have **XSRF protection enabled** (enabled by default in `HttpClient`).\n2. The attacker must be able to make the application send a state-changing HTTP request (e.g., `POST`, `PUT`, `DELETE`, `PATCH`) to a URL they control (such as `/\\attacker.example/api` or ` //attacker.example/api`).\n\n### Patches\n\nThe issue is resolved by parsing and comparing the request URL's origin against the application's current origin using the standard `URL` constructor (`new URL(req.url, locationOrigin)`).\n\n* `21.0.3` (and all `22.x` releases)\n* `20.3.34`\n\n### Workarounds\n\nIf you cannot immediately upgrade to a patched version:\n* Validate and normalize outgoing request URLs using `new URL(url, window.location.origin)` and verify that `parsedUrl.origin === window.location.origin` before passing dynamic URLs to mutating `HttpClient` requests.\n* Avoid passing untrusted or user-controlled URLs to `HttpClient` mutating methods.","state":0,"publishedAt":"2026-10-20T20:37:57+00:00","modifiedAt":"2026-10-20T20:45:05.9529393+00:00","affected":[{"ecosystem":"npm","name":"@angular/common","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"21.0.0"},{"kind":"fixed","version":"21.0.3"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@angular/common","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"20.0.0"},{"kind":"fixed","version":"20.3.34"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@angular/common","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"last_affected","version":"19.2.25"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/angular/angular/security/advisories/GHSA-jfgx-762w-99vr","https://github.com/angular/angular/pull/65683","https://github.com/angular/angular/pull/71295","https://github.com/angular/angular/commit/0659d11c854c9c6b886a2e925afef98d70bb005f","https://github.com/angular/angular/commit/20474d3f0fd7c64071add6e84acf720627e5c19b","https://github.com/angular/angular/commit/933ce817d53e25926844fa56af8230816763d08e","https://github.com/angular/angular"],"sourceUrl":"https://github.com/advisories/GHSA-jfgx-762w-99vr","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-jfgx-762w-99vr","identifiers":["GHSA-jfgx-762w-99vr","CVE-2026-111753"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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