{"id":"GHSA-5wxr-w449-57cm","summary":"Setup PHP: GitHub tokens configured by setup-php may be exposed through pinned affected Composer versions","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.","modified":"2026-05-20T15:48:07.549194960Z","published":"2026-05-20T15:32:31Z","database_specific":{"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-05-20T15:32:31Z","nvd_published_at":null,"cwe_ids":["CWE-532"]},"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"}],"affected":[{"package":{"name":"shivammathur/setup-php","ecosystem":"GitHub Actions"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.37.1"}]}],"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"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}