CVE-2026-111754

Angular: Open Redirect via Protocol-Relative URLs in Server-Side Rendering (SSR)

publishedCWE-601

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.33, 21.2.25, and 22.2.1, ServerPlatformLocation in Angular server-side rendering checks for protocol-relative URLs before WHATWG URL normalization. A request path containing a popping dot segment followed by multiple slashes can bypass the raw resolveUrl check and normalize to a pathname beginning with two slashes. When Angular SSR detects a mismatch with the router's final location, it can place that pathname in an HTTP Location header, causing a browser to navigate to an attacker-controlled origin. Affected applications use @angular/platform-server and @angular/ssr and either expose compatible parameter or child route shapes or pass user-controlled navigation targets through infrastructure that preserves the relevant dot segments or semicolons. Pure client-side SPAs are not affected. This issue is fixed in versions 20.3.33, 21.2.25, and 22.2.1.

Technical severity5.1 mediumCVSS 4.0 · CNA: GitHub_M

Published2026-11-03Source updated 2026-11-03

Collected2026-11-032 attributed sources

Fixes and workarounds

Fix

@angular/platform-server (npm): OSV reports a fixed version 22.2.1. Check the advisory for supported release branches.

Source: OSV GHSA-w739-gvwx-grc3

Fix

@angular/platform-server (npm): OSV reports a fixed version 21.2.25. Check the advisory for supported release branches.

Source: OSV GHSA-w739-gvwx-grc3

Fix

@angular/platform-server (npm): OSV reports a fixed version 20.3.33. Check the advisory for supported release branches.

Source: OSV GHSA-w739-gvwx-grc3

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
angular angular	<= 19.2.25 (affected) >= 20.0.0, < 20.3.33 (affected) >= 21.0.0, < 21.2.25 (affected) >= 22.0.0, < 22.2.1 (affected)	CNA: GitHub_M
@angular/platform-server `@angular/platform-server` npm	≥ 22.0.0; < 22.2.1 (affected, semver); OSV events: introduced 22.0.0; fixed 22.2.1 Source events (semver) `[ { "introduced": "22.0.0" }, { "fixed": "22.2.1" } ]` Other versions: unaffected	OSV GHSA-w739-gvwx-grc3
@angular/platform-server `@angular/platform-server` npm	≥ 21.0.0; < 21.2.25 (affected, semver); OSV events: introduced 21.0.0; fixed 21.2.25 Source events (semver) `[ { "introduced": "21.0.0" }, { "fixed": "21.2.25" } ]` Other versions: unaffected	OSV GHSA-w739-gvwx-grc3
@angular/platform-server `@angular/platform-server` npm	≥ 20.0.0; < 20.3.33 (affected, semver); OSV events: introduced 20.0.0; fixed 20.3.33 Source events (semver) `[ { "introduced": "20.0.0" }, { "fixed": "20.3.33" } ]` Other versions: unaffected	OSV GHSA-w739-gvwx-grc3
@angular/platform-server `@angular/platform-server` npm	≥ 0; ≤ 19.2.25 (affected, semver); OSV events: introduced 0; last affected 19.2.25 Source events (semver) `[ { "introduced": "0" }, { "last_affected": "19.2.25" } ]` Other versions: unaffected	OSV GHSA-w739-gvwx-grc3

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
4.0 / 5.1 medium	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`	CNA: GitHub_M

Exploit evidence

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

References

https://github.com/angular/angular/security/advisories/GHSA-w739-gvwx-grc3CNA: GitHub_M · x_refsource_CONFIRM
https://github.com/angular/angular/issues/71076CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/pull/71077CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/pull/71078CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/pull/71079CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/commit/450af9c813c7660b9bd91e5635f705ee3ed7b32aCNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/commit/83944fc8c50e86be90e8ec4184cd15002b5af262CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/commit/928dcfd2582152655b5559509d057bf6a5a19521CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/releases/tag/v20.3.33CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/releases/tag/v21.2.25CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/releases/tag/v22.2.1CNA: GitHub_M · x_refsource_MISC
https://github.com/advisories/GHSA-w739-gvwx-grc3OSV / GitHub Security Advisories · advisory
https://osv.dev/vulnerability/GHSA-w739-gvwx-grc3OSV / GitHub Security Advisories · osv

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