CVE-2026-47767: 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…

PriorityP356critical9.8CVSS 3.1

AVNACLPRNUINSUCHIHAH

EPSS

0.39%

31.0th percentile

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

12 ranges

Vendor	Product	Version range	Fixed in
sensiolabs	symfony	>= 5.4.46 < 5.4.52	5.4.52
sensiolabs	symfony	>= 6.4.14 < 6.4.40	6.4.40
sensiolabs	symfony	>= 7.1.7 < 7.4.12	7.4.12
sensiolabs	symfony	>= 8.0.0 < 8.0.12	8.0.12
symfony	runtime	>= 5.4.46 < 5.4.52	5.4.52
symfony	runtime	>= 6.4.14 < 6.4.40	6.4.40
symfony	runtime	>= 7.1.7 < 7.4.12	7.4.12
symfony	runtime	>= 8.0.0 < 8.0.12	8.0.12
symfony	symfony	>= 5.4.46 < 5.4.52	5.4.52
symfony	symfony	>= 6.4.14 < 6.4.40	6.4.40
symfony	symfony	>= 7.1.7 < 7.4.12	7.4.12
symfony	symfony	>= 8.0.0 < 8.0.12	8.0.12

CVSS provenance

nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvdv4.08.3HIGHCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

ghsa7.3HIGH

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