CVE-2026-54264: @angular/service-worker Sensitive Header Leakage On Cross-Origin Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qxh6-94w6-9r5p",
  "modified" : "2026-07-15T22:04:31Z",
  "published" : "2026-06-15T17:25:55Z",
  "aliases" : [ "CVE-2026-54264" ],
  "summary" : "@angular/service-worker: Sensitive Header Leakage on Cross-Origin Redirects in Angular Service Worker",
  "details" : "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. \n\nThis 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.\n\n### Impact\nIf an application configured with the Angular Service Worker fetches assets with credential headers (such as `Authorization` header), and one of those requests is redirected to a different origin, the Service Worker will forward those headers to the new origin. This exposes critical credentials and session identifiers to unauthorized third-party servers.\n\n### Attack Preconditions\nFor this vulnerability to be exploitable:\n1. **Vulnerable Configuration:** The application must utilize the `@angular/service-worker` package to fetch assets.\n2. **Credentialed Requests:** The application must attach sensitive request headers (like `Authorization`, `Proxy-Authorization`, or rely on cookies) to asset-group requests.\n3. **Redirect Flow:** These requests must encounter a cross-origin redirect to an attacker-controlled or untrusted domain.\n\n### Patched Versions\n* 22.0.1  \n* 21.2.17  \n* 20.3.25\n\n### Credits\nThis vulnerability was discovered and reported by [CodeMender from Google DeepMind](https://deepmind.google/blog/introducing-codemender-an-ai-agent-for-code-security/).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@angular/service-worker"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "22.0.0-next.0"
      }, {
        "fixed" : "22.0.1"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@angular/service-worker"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "21.0.0-next.0"
      }, {
        "fixed" : "21.2.17"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@angular/service-worker"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "20.0.0-next.0"
      }, {
        "fixed" : "20.3.25"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@angular/service-worker"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "19.2.25"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/angular/angular/security/advisories/GHSA-qxh6-94w6-9r5p"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-54264"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/angular/angular/pull/69029"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/angular/angular/commit/47d68dcb26266316647133ab6385e77fc3e5ae08"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/angular/angular"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-359" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-15T17:25:55Z",
    "nvd_published_at" : "2026-06-22T16:16:39Z"
  }
}