CVE-2026-59946

Composer: Path traversal in package bin field lets dependencies chmod arbitrary host files

Published: Jul 8, 2026Updated: Jul 10, 2026 Sources: CVE List NVDCWE-22

6.1MEDIUM

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:LAttack Vector

Local

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:RUser Interaction

Required

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-22 CWE-732

Affected Products

composer

oss-project

composerLibrary

DevTools & CI / artifact-registry

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

3 techniques

Collection

Discovery

Privilege Escalation

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References

https://github.com/composer/composer/commit/502c6c4f699802d9cf464728b3e8a95674f919a0

github.com

https://github.com/composer/composer/commit/c50b1efd13ebd73f6dca19b31424c5a02bf93cc1

github.com

https://github.com/composer/composer/releases/tag/2.10.2

github.com

and 2 more references View all →

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