CVE catalog

CVE-2026-59946

Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a Composer package bin entry containing .. path segments can resolve outside the package install directory and cause

[CVE catalog]

Severity: Medium · CVSS 6.1
Published: Jul 2, 2026, 8:56:58 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.14% · Oct 25, 2026

Composer is a dependency Manager for the PHP language. Prior to 2.2.29 and 2.10.2, a Composer package bin entry containing .. path segments can resolve outside the package install directory and cause Composer's binary installation flow to chmod an existing host file to a world-readable and world-executable mode during composer install, update, or require. This issue is fixed in versions 2.2.29 and 2.10.2.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	composer	sid	`2.10.3-1`	fixed
Debian	composer	forky	`2.10.3-1`	fixed
Debian	composer	trixie	`2.8.8-1+deb13u3`	vulnerable
Debian	composer	bookworm	`2.5.5-1+deb12u5`	vulnerable
Debian	composer	bookworm-security	`2.5.5-1+deb12u2`	vulnerable
Cpe	composer	Not reported	Not reported	vulnerable
Composer	composer/composer	Not reported	`2.10.2`	fixed
Composer	composer/composer	Not reported	`2.2.29`	fixed
Opensuse	php-composer2	tumbleweed	`2.10.2-1.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	composer	source	sid	`2.10.2-1`	not yet assigned	Not reported	Not reported
Debian	composer	source	forky	`2.10.2-1`	not yet assigned	Not reported	Not reported
Debian	composer	source	trixie	`(unfixed)`	not yet assigned	Not reported	Not reported
Debian	composer	source	bookworm	`(unfixed)`	not yet assigned	Not reported	Not reported
Composer	composer/composer	composer	Not reported	`2.10.2`	Not reported	Not reported	Not reported
Composer	composer/composer	composer	Not reported	`2.2.29`	Not reported	Not reported	Not reported
Opensuse	php-composer2	rpm	tumbleweed	`2.10.2-1.1`	Not reported	OPENSUSE-SU-2026:11268-1	Not reported

Notes

[trixie] composer: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[composer]Affected
Details (4)
- 2.5.5-1+deb12u5 · all · bookworm
  Affected
  nvd · composer · debian · bookworm; nvd · composer · debian · 12
- 2.5.5-1+deb12u5 · all · bookworm
  Affected
  nvd · composer · debian · bookworm; nvd · composer · debian · 12
- 2.5.5-1+deb12u2 · all · bookworm-security
  Affected
  nvd · composer · debian · bookworm; nvd · composer · debian · 12
- 2.5.5-1+deb12u2 · all · bookworm-security
  Affected
  nvd · composer · debian · bookworm; nvd · composer · debian · 12

[Debian 13 (Trixie)]

[composer]Affected
Details (2)
- 2.8.8-1+deb13u3 · all · trixie
  Affected
  nvd · composer · debian · 13
- 2.8.8-1+deb13u3 · all · trixie
  Affected
  nvd · composer · debian · 13

[openSUSE Tumbleweed]

[php-composer2]Fixed
Source package: [php-composer2]
Details (1)
- 2.10.3-1.1 · noarch · tumbleweed
  Fixed · Fixed: 2.10.2-1.1
  nvd · php-composer2 · opensuse · tumbleweed

Observed: Oct 23, 2026, 9:44:35 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]