# CVE-2026-54264: Google Angular sensitive header leakage in Service Worker

Source: https://junglewise.ai/threats/cve-2026-54264-google-angular-sensitive-header-leakage-in-service-worker  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-22. Updated: 2026-06-22  
License: CC BY 4.0 with a link back

CVE-2026-54264 · Severity: high · CVSS 3.1 · Published 2026-06-22

Angular is a popular framework used to build web and mobile applications. A security flaw in its Service Worker component could allow sensitive information, such as login tokens or session cookies, to be sent to unauthorized third-party websites. This occurs when a legitimate request is redirected to a different domain, potentially allowing an attacker to hijack user sessions or access private data.

Technologies: [@angular/service-worker (npm)](https://junglewise.ai/threats/technologies/angular-service-worker). Vendors: [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is CVE-2026-54264 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-54264 being exploited in the wild.

**How severe is CVE-2026-54264?** High severity, with a CVSS score of 3.1, published 22 June 2026.

**Which products and versions are affected?** @angular/service-worker (npm) SEMVER:introduced=22.0.0-next.0,fixed=22.0.1.

**Is there a fix for CVE-2026-54264?** Yes. @angular/service-worker (npm): upgrade to 22.0.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-54264 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-54264?** Check whether you run @angular/service-worker (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- @angular/service-worker (npm): upgrade to 22.0.1 or later

  ```sh
  npm install @angular/service-worker@22.0.1
  ```


## Technical details

An information disclosure vulnerability exists in the @angular/service-worker package due to a violation of the Fetch redirect algorithm. When the Service Worker fetches assets, it preserves request metadata including sensitive headers like 'Authorization', 'Cookie', and 'Proxy-Authorization'. If a request encounters a cross-origin redirect, the Service Worker fails to strip these headers before forwarding the request to the new origin. An attacker can exploit this by triggering a redirect to an untrusted domain, thereby capturing the user's credentials or session identifiers. The issue is resolved in versions 20.3.25, 21.2.17, and 22.0.1 by explicitly removing these headers during cross-origin transitions.

## Affected products

- Google Angular < 20.3.25, >= 21.0.0-next.0 < 21.2.17, >= 22.0.0-next.0 < 22.0.1

## Identifiers

- CVE-2026-54264
- GHSA-qxh6-94w6-9r5p

## Timeline

- 2026-05-31: other: Pull request submitted to fix the issue
- 2026-06-10: advisory: GitHub Security Advisory published
- 2026-06-22: disclosed: CVE published to NVD

## References

- [https://github.com/angular/angular/commit/47d68dcb26266316647133ab6385e77fc3e5ae08](https://github.com/angular/angular/commit/47d68dcb26266316647133ab6385e77fc3e5ae08)
- [https://github.com/angular/angular/pull/69029](https://github.com/angular/angular/pull/69029)
- [https://github.com/angular/angular/security/advisories/GHSA-qxh6-94w6-9r5p](https://github.com/angular/angular/security/advisories/GHSA-qxh6-94w6-9r5p)

## Related threats

- [Angular Service Worker credential and cache policy stripping](https://junglewise.ai/threats/cve-2026-50184-angular-service-worker-credential-and-cache-policy-stripping)
- [Angular Service Worker redirect policy bypass in @angular/service-worker](https://junglewise.ai/threats/cve-2026-50169-angular-service-worker-redirect-policy-bypass-in-angular-service)