{"cve":"CVE-2023-43655","nvd":{"published":"2023-09-29T20:15:09.987","modified":"2026-06-17T06:26:09.867","status":"Analyzed","description":"Composer is a dependency manager for PHP. Users publishing a composer.phar to a public web-accessible server where the composer.phar can be executed as a php file may be subject to a remote code execution vulnerability if PHP also has `register_argc_argv` enabled in php.ini. Versions 2.6.4, 2.2.22 and 1.10.27 patch this vulnerability. Users are advised to upgrade. Users unable to upgrade should make sure `register_argc_argv` is disabled in php.ini, and avoid publishing composer.phar to the web as this is not best practice.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-74"],"references":["https://github.com/composer/composer/commit/4fce14795aba98e40b6c4f5047305aba17a6120d","https://github.com/composer/composer/commit/955a48e6319c8962e5cd421b07c00ab3c728968c","https://github.com/composer/composer/commit/95e091c921037b7b6564942845e7b738f6b95c9c","https://github.com/composer/composer/security/advisories/GHSA-jm6m-4632-36hf","https://lists.debian.org/debian-lts-announce/2024/03/msg00030.html"],"products":["debian:debian_linux","fedoraproject:fedora","getcomposer:composer"],"source":"nvd","synced_at":"2026-10-19T21:39:34.467980132+00:00"},"epss":{"cve":"CVE-2023-43655","score":0.01532,"percentile":0.74798,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}