Sensiolabs Symfony — CVE-2026-47767 (Critical)

Date Jul 14, 2026

Type Vendor advisory

Signal Critical vendor advisory

Vendor / Product Sensiolabs · Symfony

CVE CVE-2026-47767

Critical vendor advisory CVE-2026-47767

Summary

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.

Why it matters

This CVE carries a CRITICAL severity rating (CVSS 9.8) in Sensiolabs Symfony. Patch or mitigate promptly. EPSS percentile: 25%.

Operator check

Review CVE-2026-47767 in your asset inventory. Apply patches per vendor guidance and verify Symfony is not exposed. CVSS score: 9.8. EPSS probability: 0.3%; percentile: 25%.

Sources

NVD — CVE-2026-47767 Source reference Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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