SB20260827156 - Fedora 45 update for composer
Published: August 27, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Link following (CVE-ID: CVE-2026-59944)
CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to path traversal and improper link resolution in package binary handling when installing a malicious or compromised dependency package. A remote attacker can supply a specially crafted package or manipulated installed dependency metadata to cause Composer to change permissions on a file outside the package directory and expose its contents to disclose sensitive information.
User interaction is required to install or update dependencies. The issue can be triggered through a symbolic link that resolves outside the package directory or through crafted vendor/composer/installed.json metadata when binaries are regenerated from an existing vendor directory.
Remediation
Install update from vendor's website.