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CVE-2026-59948

Composer: Arbitrary file write outside vendor via malicious transitive package name PUBLISHED

Description (CNA)

Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a maliciously crafted package from an untrusted repository other than Packagist.org or Private Packagist can cause Composer to write attacker-controlled files outside the vendor directory and outside the project during install or update by using an invalid package name that is not correctly validated before dependency-resolution results are written or installed. This issue is fixed in versions 2.2.29 and 2.10.2.

Affected (CNA)

Vendor / productVersions
composer / composeraffected >= 1.0, < 2.2.29; affected >= 2.3.0, < 2.10.2

CWE

CWE-22, CWE-787

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.