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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
NVD MITRE
EPSS Score
0.1%
Top 96.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
OpenVAS

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

AV:LAC:LPR:NUI:RS:UC:HI:LA:N
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-22CWE-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
View detailed technique mapping

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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