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Advisory record · GHSA-fqc7-9xjw-jrh3

SymfonyRuntime CVE-2024-50340 Patch Bypass: Web Requests Can Still Set APP_ENV/APP_DEBUG via parse_str/SAPI Argv Mismatch

CVSS 8.3 HighEPSS 0.0072 · 54th percentile

Published by the GitHub Advisory Database at 9 Jun 2026, 21:58 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
symfony/runtimePackagist>=5.4.46, <5.4.52 || >=6.4.14, <6.4.40 || >=7.1.7, <7.4.12 || >=8.0.0, <8.0.125.4.52, 6.4.40, 7.4.12, 8.0.12
symfony/symfonyPackagist>=5.4.46, <5.4.52 || >=6.4.14, <6.4.40 || >=7.1.7, <7.4.12 || >=8.0.0, <8.0.125.4.52, 6.4.40, 7.4.12, 8.0.12
Identifiers
GHSA-fqc7-9xjw-jrh3 · CVE-2026-47767 · PKSA-9crr-v2h4-wg18 · PKSA-xf5h-y6vg-qj98
Weakness (CWE)
CWE-20 · CWE-74 · CWE-436
Tags
Published
9 Jun 2026
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The symfony/runtime and symfony/symfony Packagist packages are affected in versions from 5.4.46 to before 5.4.52, from 6.4.14 to before 6.4.40, from 7.1.7 to before 7.4.12, and from 8.0.0 to before 8.0.12. The fix is to upgrade to 5.4.52, 6.4.40, 7.4.12, or 8.0.12. This bypasses an earlier fix for CVE-2024-50340. An unauthenticated attacker making a crafted GET request can, when register_argc_argv is On and the app is booted through symfony/runtime, set APP_ENV and toggle APP_DEBUG.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.3 High 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0072, the 54th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:00 UTC First seen by agentprime
  2. 31 Oct 2026, 14:00 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.