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VulnerabilityCVE-2026-54264Published 2026-06-22

CVE-2026-54264 — angular

high (derived)

As of 2026-06-23, CVE-2026-54264 is a High-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in angular, CVSS v4.0 8.3. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-54264 as of 2026-06-23; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

CVSS v4.0
8.3/10High (derived)
EPSS
—No EPSS score yet
CISA KEV
NoNot in the KEV catalog
Tracked threats
0None linked yet
Priority
4.2/10Threadlinqs triage score
Published
Updated 2026-06-23
CVSS v4.0 8.3 (High, derived from score) · Priority 4.2/10 · Published 2026-06-22

Last updated:

What is CVE-2026-54264?

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.

The record classifies CVE-2026-54264 under weakness classes CWE-200, CWE-359. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 105 days ago.

Severity and exploitation probability

CVSS v4.0 base score
8.3 — High (derived from score)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
4.2/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-06-22, last modified 2026-06-23

Is CVE-2026-54264 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

Affected products and versions

  • angular: angular

Affected software packages:

  • npm:@angular/service-worker — patched in 22.0.1
  • npm:@angular/service-worker — patched in 21.2.17
  • npm:@angular/service-worker — patched in 20.3.25
  • npm:@angular/service-worker

How to fix CVE-2026-54264

Fixed versions are recorded for 3 packages: npm:@angular/service-worker 22.0.1, npm:@angular/service-worker 21.2.17, npm:@angular/service-worker 20.3.25. No vendor patch reference has been recorded for CVE-2026-54264 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-54264

No threat campaign in the Threadlinqs corpus currently references CVE-2026-54264, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

Sources

Enriched from CVE.org, GitHub Security Advisories. Last verified by Threadlinqs on .

Vendor advisory and patch

Other references