# CVE-2026-111753: Angular: XSRF Token Leakage via URL Parsing Discrepancy in Angular HTTP Client (Incomplete fix for CVE-2025-66035)

Status: published. Published: 2026-11-05. Updated: 2026-11-09.

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.

## Remediation

- fix: @angular/common (npm): GitHub reports patched versions 21.0.3. Check the advisory for the affected release branch. (source: GitHub GHSA-jfgx-762w-99vr) — https://github.com/angular/angular/security/advisories/GHSA-jfgx-762w-99vr
- fix: @angular/common (npm): GitHub reports patched versions 20.3.34. Check the advisory for the affected release branch. (source: GitHub GHSA-jfgx-762w-99vr) — https://github.com/angular/angular/security/advisories/GHSA-jfgx-762w-99vr
- fix: @angular/common (npm): OSV reports a fixed version 21.0.3. Check the advisory for supported release branches. (source: OSV GHSA-jfgx-762w-99vr) — https://github.com/advisories/GHSA-jfgx-762w-99vr
- fix: @angular/common (npm): OSV reports a fixed version 20.3.34. Check the advisory for supported release branches. (source: OSV GHSA-jfgx-762w-99vr) — https://github.com/advisories/GHSA-jfgx-762w-99vr

## Affected products and versions

- angular / angular: <= 19.2.25 (affected); >= 20.0.0, < 20.3.34 (affected); >= 21.0.0, < 21.0.3 (affected). Source: CNA: GitHub_M
-  / @angular/common (@angular/common): >= 21.0.0, < 21.0.3 (affected, GitHub advisory range). Source: GitHub GHSA-jfgx-762w-99vr
-  / @angular/common (@angular/common): >= 20.0.0, < 20.3.34 (affected, GitHub advisory range). Source: GitHub GHSA-jfgx-762w-99vr
-  / @angular/common (@angular/common): <= 19.2.25 (affected, GitHub advisory range). Source: GitHub GHSA-jfgx-762w-99vr
-  / @angular/common (@angular/common): ≥ 21.0.0; < 21.0.3 (affected, semver); OSV events: introduced 21.0.0; fixed 21.0.3. Source: OSV GHSA-jfgx-762w-99vr
-  / @angular/common (@angular/common): ≥ 20.0.0; < 20.3.34 (affected, semver); OSV events: introduced 20.0.0; fixed 20.3.34. Source: OSV GHSA-jfgx-762w-99vr
-  / @angular/common (@angular/common): ≥ 0; ≤ 19.2.25 (affected, semver); OSV events: introduced 0; last affected 19.2.25. Source: OSV GHSA-jfgx-762w-99vr

## Severity and prioritization

- CVSS 4.0: 5.9 (medium); 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; source: CNA: GitHub_M

- CVSS 4.0: 5.9 (medium); 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; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: 0.54% as of 2026-11-09; percentile 45.54%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-201, CWE-359

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/angular/angular/security/advisories/GHSA-jfgx-762w-99vr (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/angular/angular/issues/71294 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/pull/65683 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/pull/71295 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/commit/20474d3f0fd7c64071add6e84acf720627e5c19b (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/commit/933ce817d53e25926844fa56af8230816763d08e (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/releases/tag/21.0.3 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/releases/tag/v20.3.34 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/commit/20474d3f0fd7c64071add6e84acf720627e5c19b (security-advisories@github.com)

- https://github.com/angular/angular/commit/933ce817d53e25926844fa56af8230816763d08e (security-advisories@github.com)

- https://github.com/angular/angular/issues/71294 (security-advisories@github.com)

- https://github.com/angular/angular/pull/65683 (security-advisories@github.com)

- https://github.com/angular/angular/pull/71295 (security-advisories@github.com)

- https://github.com/angular/angular/releases/tag/21.0.3 (security-advisories@github.com)

- https://github.com/angular/angular/releases/tag/v20.3.34 (security-advisories@github.com)

- https://github.com/angular/angular/security/advisories/GHSA-jfgx-762w-99vr (security-advisories@github.com)

- https://github.com/angular/angular/security/advisories/GHSA-jfgx-762w-99vr (GitHub Security Advisories; advisory)

- https://github.com/advisories/GHSA-jfgx-762w-99vr (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-jfgx-762w-99vr (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-111753; retrieved 2026-11-09; source updated 2026-11-09

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-111753; retrieved 2026-11-10; source updated 2026-11-09

- GitHub Security Advisories: https://github.com/angular/angular/security/advisories/GHSA-jfgx-762w-99vr; retrieved 2026-11-07; source updated 2026-10-19

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-jfgx-762w-99vr; retrieved 2026-11-05; source updated 2026-10-20

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-111753; retrieved 2026-11-09; source updated Not reported

Revision: 9a54907189348290a3fe3fbe5fe638d2fada095258cf33c10b0b656d5f1101cf

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