{"id":"GHSA-5wxr-w449-57cm","aliases":[],"status":"published","title":"Setup PHP: GitHub tokens configured by setup-php may be exposed through pinned affected Composer versions","description":"### 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.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-532"],"published":"2026-05-20T15:32:31Z","modified":"2026-05-20T15:48:07Z","fixes":[{"ecosystem":"GitHub Actions","package":"shivammathur/setup-php","fixed_in":["2.37.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"GitHub Actions","package":"shivammathur/setup-php","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.37.1"}]}]},{"source":"osv","ecosystem":"GitHub Actions","package":"shivammathur/setup-php","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.37.1"}]}]}],"references":[{"url":"https://github.com/composer/composer/security/advisories/GHSA-f9f8-rm49-7jv2","tags":["web"]},{"url":"https://github.com/shivammathur/setup-php/security/advisories/GHSA-5wxr-w449-57cm","tags":["web"]},{"url":"https://github.com/shivammathur/setup-php/commit/7748c243803a56671412f9f7c745769e9573c6d4","tags":["web"]},{"url":"https://github.com/advisories/GHSA-5wxr-w449-57cm"},{"url":"https://github.com/shivammathur/setup-php","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-5wxr-w449-57cm","title":"Setup PHP: GitHub tokens configured by setup-php may be exposed through pinned affected Composer versions","description":"### 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.","status":"published","published":"2026-05-20T15:32:31Z","modified":"2026-05-20T15:32:32Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-532"],"updated_at":"2026-11-02T14:40:13.628377Z"}],"osv":[{"id":"GHSA-5wxr-w449-57cm","title":"Setup PHP: GitHub tokens configured by setup-php may be exposed through pinned affected Composer versions","description":"### 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.","status":"published","published":"2026-05-20T15:32:31Z","modified":"2026-05-20T15:48:07.54919496Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-532"],"updated_at":"2026-11-02T15:46:38.911014Z"}]}}