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Fedora 42: Composer Critical ANSI Injection Denial of Service Advisory

Fedora 42: Composer Critical ANSI Injection Denial of Service Advisory

Linuxsecurity •LinuxSecurity Advisories • January 14, 2026

Composer helps you declare, manage and install dependencies of PHP projects, ensuring you have the right stack everywhere. Documentation: Update Information : Version 2.9.3 - 2025-12-30 Security: Fixed ANSI sequence injection (GHSA-59pp-r3rg-353g / CVE-2025-67746) Fixed COMPOSER_NO_SECURITY_BLOCKING env var not being respected for updates done via the install command, and added --no-security-blocking flag to install as well (#12677) Fixed update --lock / update mirrors not working when locked packages contain vulnerabilities (#12645) Fixed client-certificate authentication implementation (#12667) Fixed php-ext schema not being validated in ValidatingArrayLoader (#12694) Fixed crash when --bump-after-update is used and the lock file is disabled (#12660) Fixed support for SecureTransport + LibreSSL on macOS (#12615) Fixed display of reasons for why advisories are ignored (#12668) Fixed compatibility issues when git has log.showSignature enabled (#12666) Fixed curl downloader not retrying when a timeout (err 28) failure occurs (#12662) Fixed EventDispatcher requiring a full Composer instance to function (#12629)

Composer helps you declare, manage and install dependencies of PHP projects,

ensuring you have the right stack everywhere.

Documentation:

Version 2.9.3 - 2025-12-30 Security: Fixed ANSI sequence injection (GHSA-59pp-r3rg-353g / CVE-2025-67746) Fixed COMPOSER_NO_SECURITY_BLOCKING env var not being respected for updates done via the install command, and added --no-security-blocking flag to install as well (#12677) Fixed update --lock / update mirrors not working when locked packages contain vulnerabilities (#12645) Fixed client-certificate authentication implementation (#12667) Fixed php-ext schema not being validated in ValidatingArrayLoader (#12694) Fixed crash when --bump-after-update is used and the lock file is disabled (#12660) Fixed support for SecureTransport + LibreSSL on macOS (#12615) Fixed display of reasons for why advisories are ignored (#12668) Fixed compatibility issues when git has log.showSignature enabled (#12666) Fixed curl downloader not retrying when a timeout (err 28) failure occurs (#12662) Fixed EventDispatcher requiring a full Composer instance to function (#12629)

* Wed Dec 31 2025 Remi Collet - 2.9.3-1 - update to 2.9.3

* Wed Dec 31 2025 Remi Collet - 2.9.3-1 - update to 2.9.3

[ 1 ] Bug #2428107 - CVE-2025-67746 composer: Composer: Terminal output manipulation leading to Denial of Service [fedora-42]

[ 1 ] Bug #2428107 - CVE-2025-67746 composer: Composer: Terminal output manipulation leading to Denial of Service [fedora-42]

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-13b4dbe546' at the command line. For more information, refer to the dnf documentation available at

Extracted Entities

Attack Types (1)

Companies (1)

Platforms (1)

Vulnerabilities (1)