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TI-2026-39164 Aliases CVE-2026-54264GHSA-qxh6-94w6-9r5p

Angular: Sensitive Header Leakage on Cross-Origin Redirects in Angular Service Worker

Priority LOW 36CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0039 33rd percentileScored 2026-11-07
Fix Fixed @angular/service-worker (npm): 22.0.1, 21.2.17, 20.3.25

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
angularangular>= 22.0.0-next.0 < 22.0.1; >= 21.0.0-next.0 < 21.2.17; >= 20.0.0-next.0 < 20.3.25; up to 19.2.25—No fix listedCNA
—@angular/service-worker (npm)22.0.0-next.0 to before 22.0.122.0.1Patch availableGHSA-qxh6-94w6-9r5p
—@angular/service-worker (npm)21.0.0-next.0 to before 21.2.1721.2.17Patch availableGHSA-qxh6-94w6-9r5p
—@angular/service-worker (npm)20.0.0-next.0 to before 20.3.2520.3.25Patch availableGHSA-qxh6-94w6-9r5p
—@angular/service-worker (npm)up to 19.2.25—No fix listedGHSA-qxh6-94w6-9r5p
  • angular Vendorangular Affected >= 22.0.0-next.0 < 22.0.1; >= 21.0.0-next.0 < 21.2.17; >= 20.0.0-next.0 < 20.3.25; up to 19.2.25 Fixed in — No fix listed CNA
  • @angular/service-worker (npm) Vendor— Affected 22.0.0-next.0 to before 22.0.1 Fixed in 22.0.1 Patch available GHSA-qxh6-94w6-9r5p
  • @angular/service-worker (npm) Vendor— Affected 21.0.0-next.0 to before 21.2.17 Fixed in 21.2.17 Patch available GHSA-qxh6-94w6-9r5p
  • @angular/service-worker (npm) Vendor— Affected 20.0.0-next.0 to before 20.3.25 Fixed in 20.3.25 Patch available GHSA-qxh6-94w6-9r5p
  • @angular/service-worker (npm) Vendor— Affected up to 19.2.25 Fixed in — No fix listed GHSA-qxh6-94w6-9r5p

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:*up to 19.2.25; 20.0.0 to before 20.3.25; 21.0.0 to before 21.2.17; 22.0.0 to before 22.0.1Vulnerableangular
  • cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* Versions up to 19.2.25; 20.0.0 to before 20.3.25; 21.0.0 to before 21.2.17; 22.0.0 to before 22.0.1 Vulnerable ·angular

Remediation

  • Fix · GHSA-qxh6-94w6-9r5p @angular/service-worker (npm) Fixed in 22.0.1 Advisory →
  • Fix · GHSA-qxh6-94w6-9r5p @angular/service-worker (npm) Fixed in 21.2.17 Advisory →
  • Fix · GHSA-qxh6-94w6-9r5p @angular/service-worker (npm) Fixed in 20.3.25 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat Fuse 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54264
  2. 2026-10-03 Alias added: GHSA-qxh6-94w6-9r5p

References

Patch 2

Advisory 2

Other 1

  • TI-2026-60076 Angular: SSRF and Cross-Origin Credential Disclosure via URL Resolution Discrepancy in SSR CVSS 4.0HIGH 8.6
  • TI-2026-60080 Angular: SSR XSS via Unescaped <template> Content Across DocumentFragment Boundaries in Fallback Raw-Content Elements CVSS 4.0HIGH 8.6
  • TI-2026-60078 Angular: SSR XSS via Unescaped Processing Instruction (<?...?>) Nodes in Fallback Raw-Content Elements CVSS 4.0HIGH 8.6
  • TI-2025-37971 A reflected cross-site scripting (XSS) vulnerability in CKeditor v46.1.0 & Angular… CVSS 3.1MEDIUM 5.4
  • TI-2026-36931 Angular: URL Parser Differential in @angular/platform-server leading to SSRF Allowlist Bypass CVSS 4.0HIGH 8.8
  • TI-2026-34131 Angular: SSRF via Hostname Hijacking in @angular/platform-server CVSS 4.0HIGH 8.8
See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences