# CVE-2026-111754: Angular: Open Redirect via Protocol-Relative URLs in Server-Side Rendering (SSR)

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

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.

## Remediation

- 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) — https://github.com/advisories/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) — https://github.com/advisories/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) — https://github.com/advisories/GHSA-w739-gvwx-grc3

## Affected products and versions

- 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). Source: CNA: GitHub_M
-  / @angular/platform-server (@angular/platform-server): ≥ 22.0.0; < 22.2.1 (affected, semver); OSV events: introduced 22.0.0; fixed 22.2.1. Source: OSV GHSA-w739-gvwx-grc3
-  / @angular/platform-server (@angular/platform-server): ≥ 21.0.0; < 21.2.25 (affected, semver); OSV events: introduced 21.0.0; fixed 21.2.25. Source: OSV GHSA-w739-gvwx-grc3
-  / @angular/platform-server (@angular/platform-server): ≥ 20.0.0; < 20.3.33 (affected, semver); OSV events: introduced 20.0.0; fixed 20.3.33. Source: OSV GHSA-w739-gvwx-grc3
-  / @angular/platform-server (@angular/platform-server): ≥ 0; ≤ 19.2.25 (affected, semver); OSV events: introduced 0; last affected 19.2.25. Source: OSV GHSA-w739-gvwx-grc3

## Severity and prioritization

- CVSS 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; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

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

- Weaknesses: CWE-601

## 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-grc3 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/angular/angular/issues/71076 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/pull/71077 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/pull/71078 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/pull/71079 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/commit/450af9c813c7660b9bd91e5635f705ee3ed7b32a (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/commit/83944fc8c50e86be90e8ec4184cd15002b5af262 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/commit/928dcfd2582152655b5559509d057bf6a5a19521 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/releases/tag/v20.3.33 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/releases/tag/v21.2.25 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/releases/tag/v22.2.1 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/advisories/GHSA-w739-gvwx-grc3 (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-w739-gvwx-grc3 (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-111754; retrieved 2026-11-03; source updated 2026-11-03

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-w739-gvwx-grc3; retrieved 2026-11-03; source updated 2026-10-20

Revision: 739ab1334c39617319ea9cd59582c573a1eae26092df6520ae5bdc7c70074c2e

Canonical: https://y2.dev/cve/CVE-2026-111754

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