Setup PHP: GitHub tokens configured by setup-php may be exposed through pinned affected Composer versions — GHSA-5WXR-W449-57CM

Summary

### Impact This affects only workflows that pin an exact affected Composer semver version through setup-php, for example `tools: composer:2.9.7`. Workflows 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. setup-php does not directly print the…

Product

actions: shivammathur/setup-php

What to do

General, cautious steps (verify details in the official source):

• Review exposure and plan remediation based on risk and environment.
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source

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