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CVE-2026-45793: Github Actions issued GITHUB_TOKEN disclosure in GitHub Actions logs

high Affects composer/composer. Feed 2026.10.29.3, updated 2026-10-29; published ; advisory modified .

Github Actions issued GITHUB_TOKEN disclosure in GitHub Actions logs

Package
composer/composer Composer
Affected versions
>=2.3.0 and <2.9.8 or >=2.0.0 and <2.2.28 or >=1.0 and <1.10.28 or >=2.3 and <2.9.8
Fixed in
2.9.8, 2.2.28, 1.10.28
Severity
high  CVSS 7.5
Exploitation
not on CISA KEV · EPSS 1% (63.3th percentile)
Published
2026-05-19
Source
osv.dev

References

CWE-200
NVD recordcomposer/composer advisories

Am I affected?

Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden deps composer.lock

# or, without Composer
pipx install phpwarden   &&   phpwarden deps composer.lock

Or keep it checked automatically: GitHub Action · pre-commit hook · GitLab CI · Laravel artisan command

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