# CVE-2026-54264 — angular

> 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.

**Last updated:** 2026-06-23

## 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](https://intel.threadlinqs.com/cwe/CWE-200), [CWE-359](https://intel.threadlinqs.com/cwe/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 2026-06-24.

**Vendor advisory and patch**

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

**Other references**

- [github.com](https://github.com/angular/angular/pull/69029)
- [github.com (47d68dcb26266316647133ab6385e77fc3e5ae08)](https://github.com/angular/angular/commit/47d68dcb26266316647133ab6385e77fc3e5ae08)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-54264
Full detection coverage and IOCs for threats exploiting CVE-2026-54264 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp