Medium [CVE-2026-54264] @angular/service-worker: @angular/service-worker: Information Disclosure via unstripped sensitive headers on cross-origin redirects
This medium-severity Red Hat Linux advisory covers CVE-2026-54264.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.1, 21.2.17, and 20.3.25, an information disclosure vulnerability exists in the @angular/service-worker package of the Angular framework.
When the Service Worker fetches assets, it preserves metadata (such as headers) from the original request. However, on cross-origin redirects, the Service Worker fails to strip sensitive headers, violating the Fetch redirect algorithm.
This allows a remote attacker to obtain sensitive credentials (e.g., Authorization tokens, Proxy-Authorization credentials, or session cookies) by triggering a cross-origin redirect to an untrusted external origin. This vulnerability is fixed in 22.0.1, 21.2.17, and 20.3.25.
This Moderate information disclosure flaw in the Angular Service Worker could allow a remote attacker to obtain sensitive credentials by exploiting improper handling of cross-origin redirects. However, Red Hat JBoss Fuse is not affected by this vulnerability as the vulnerable code is not present in the product.
Red Hat severity: Moderate — CVSS 6.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N). Weakness: CWE-212.
Is CVE-2026-54264 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-54264 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-54264?
Upgrade to a fixed release named by Red Hat:
- 22.0.1
- 21.2.17
- 20.3.25
Confirm against the vendor advisory before you patch.
- < 22.0.1
- < 21.2.17
- < 20.3.25
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
- 22.0.1
- 21.2.17
- 20.3.25
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
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