ghsa-5wxr-w449-57cm

{
  "affected": [
    {
      "database_specific": {
        "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-5wxr-w449-57cm/GHSA-5wxr-w449-57cm.json"
      },
      "package": {
        "ecosystem": "GitHub Actions",
        "name": "shivammathur/setup-php"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.37.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-532"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-20T15:32:31Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nThis affects only workflows that pin an exact affected Composer semver version through setup-php, for example `tools: composer:2.9.7`.\n\nWorkflows using the default Composer version, `composer:v2`, or no pinned Composer version are not affected through setup-php, because those Composer URLs have been updated to patched Composer releases for all setup-php versions.\n\nsetup-php does not directly print the token. The token may be exposed through Composer when Composer validates github-oauth auth and rejects GitHub's newer hyphen-containing token format.\n\nPublic repository logs may expose the token. GitHub-hosted runner GITHUB_TOKEN values expire after the job, but exposure may still matter during the token lifetime and for longer-lived GitHub App or user tokens.\n\n### Patches\nsetup-php 2.37.1 skips generated GitHub OAuth auth for pinned Composer versions affected by Composer GHSA-f9f8-rm49-7jv2 while preserving other Composer auth, including Packagist auth.\n\n### Workarounds\nUpgrade to setup-php `2.37.1` or newer. You can also avoid the affected path by using a patched Composer version: 2.9.8, 2.2.28, 1.10.28, or newer supported Composer releases.\n\nIt is recommended to avoid pinning affected Composer versions such as `composer:2.9.7`, unless you have automations to do timely updates in your workflows.",
  "id": "GHSA-5wxr-w449-57cm",
  "modified": "2026-05-20T15:48:07.549194960Z",
  "published": "2026-05-20T15:32:31Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/composer/composer/security/advisories/GHSA-f9f8-rm49-7jv2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/shivammathur/setup-php/security/advisories/GHSA-5wxr-w449-57cm"
    },
    {
      "type": "WEB",
      "url": "https://github.com/shivammathur/setup-php/commit/7748c243803a56671412f9f7c745769e9573c6d4"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/shivammathur/setup-php"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Setup PHP: GitHub tokens configured by setup-php may be exposed through pinned affected Composer versions"
}