CVE-2026-47767

CRITICAL

Symfony Runtime - APP_ENV/APP_DEBUG Override via SAPI Argv Mismatch

Title source: manual
STIX 2.1

Description

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.

References (6)

Core 6

Scores

CVSS v3 9.8
EPSS 0.0039
EPSS Percentile 31.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-436
Status published
Products (9)
sensiolabs/symfony 5.4.46 - 5.4.52
symfony/runtime >= 5.4.46, < 5.4.52
symfony/runtime >= 6.4.14, < 6.4.40
symfony/runtime >= 7.1.7, < 7.4.12
symfony/runtime >= 8.0.0-BETA1, < 8.0.12
symfony/symfony >= 5.4.46, < 5.4.52
symfony/symfony >= 6.4.14, < 6.4.40
symfony/symfony >= 7.1.7, < 7.4.12
symfony/symfony >= 8.0.0-BETA1, < 8.0.12
Published Jul 14, 2026
Tracked Since Jul 15, 2026