by Kastro CVE-2026-47767
symfony symfony — Symfony: SymfonyRuntime CVE-2024-50340 Patch Bypass: Web Requests Can Still Set APP_ENV/APP_DEBUG via parse_str/SAPI Argv Mismatch
Description · from the CVE record
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 5.4.46 until 5.4.52, 6.4.40, 7.4.12, and 8.0.12, the CVE-2024-50340 fix gated runtime argv parsing on empty($_GET), but parse_str() and the web SAPI can disagree, allowing a crafted query string to leave $_GET empty while $_SERVER['argv'] still carries attacker-controlled --env or --no-debug flags that change APP_ENV or APP_DEBUG. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
Affected
ProductAffectedFixed inSource
symfony>= 5.4.46, < 5.4.52–CNA
symfony>= 6.4.14, < 6.4.40–CNA
symfony>= 7.1.7, < 7.4.12–CNA
symfony>= 8.0.0-BETA1, < 8.0.12–CNA
runtime>= 5.4.46, < 5.4.52–CNA
runtime>= 6.4.14, < 6.4.40–CNA
runtime>= 7.1.7, < 7.4.12–CNA
runtime>= 8.0.0-BETA1, < 8.0.12–CNA
Scores by source
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)8.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total