Composer is a dependency manager for PHP. In versions on the 2.x branch prior to 2.2.26 and 2.9.3, attackers controlling remote sources that Composer downloads from might in some way inject ANSI control characters in the terminal output of various Composer commands, causing mangled output and potentially leading to confusion or DoS of the terminal application. There is no proven exploit and this has thus a low severity but we still publish a CVE as it has potential for abuse, and we want to be on the safe side informing users that they should upgrade. Versions 2.2.26 and 2.9.3 contain a patch for the issue.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1365 advisory.

    Composer is a dependency manager for PHP. In versions on the 2.x branch prior to 2.2.26 and 2.9.3,     attackers controlling remote sources that Composer downloads from might in some way inject ANSI control     characters in the terminal output of various Composer commands, causing mangled output and potentially     leading to confusion or DoS of the terminal application. There is no proven exploit and this has thus a     low severity but we still publish a CVE as it has potential for abuse, and we want to be on the safe side     informing users that they should upgrade. Versions 2.2.26 and 2.9.3 contain a patch for the issue.
    (CVE-2025-67746)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-13b4dbe546 advisory.

    ### 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)



Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-0b03072979 advisory.

    ### 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)



Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Composer is a dependency manager for PHP. In versions on the 2.x branch prior to 2.2.26 and 2.9.3,     attackers controlling remote sources that Composer downloads from might in some way inject ANSI control     characters in the terminal output of various Composer commands, causing mangled output and potentially     leading to confusion or DoS of the terminal application. There is no proven exploit and this has thus a     low severity but we still publish a CVE as it has potential for abuse, and we want to be on the safe side     informing users that they should upgrade. Versions 2.2.26 and 2.9.3 contain a patch for the issue.
    (CVE-2025-67746)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
296225	Amazon Linux 2023 : composer (ALAS2023-2026-1365)	Nessus	Amazon Linux Local Security Checks	medium
283686	Fedora 42 : composer (2026-13b4dbe546)	Nessus	Fedora Local Security Checks	medium
283573	Fedora 43 : composer (2026-0b03072979)	Nessus	Fedora Local Security Checks	medium
280698	Linux Distros Unpatched Vulnerability : CVE-2025-67746	Nessus	Misc.	medium

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