Read the docs
TI-2026-19944 Aliases CVE-2026-24739GHSA-r39x-jcww-82v6

Symfony has incorrect argument escaping under MSYS2/Git Bash on Windows that can lead to destructive file operations

Priority LOW 28CWE-88Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-88.

Summary

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to versions 5.4.51, 6.4.33, 7.3.11, 7.4.5, and 8.0.5, the Symfony Process component did not correctly treat some characters (notably `=`) as “special” when escaping arguments on Windows. When PHP is executed from an MSYS2-based environment (e.g. Git Bash) and Symfony Process spawns native Windows executables, MSYS2’s argument/path conversion can mis-handle unquoted arguments containing these characters. This can cause the spawned process to receive corrupted/truncated arguments compared to what Symfony intended. If an application (or tooling such as Composer scripts) uses Symfony Process to invoke file-management commands (e.g. `rmdir`, `del`, etc.) with a path argument containing `=`, the MSYS2 conversion layer may alter the argument at runtime. In affected setups this can result in operations being performed on an unintended path, up to and including deletion of the contents of a broader directory or drive. The issue is particularly relevant when untrusted input can influence process arguments (directly or indirectly, e.g. via repository paths, extracted archive paths, temporary directories, or user-controlled configuration). Versions 5.4.51, 6.4.33, 7.3.11, 7.4.5, and 8.0.5 contains a patch for the issue. Some workarounds are available. Avoid running PHP/one's own tooling from MSYS2-based shells on Windows; prefer cmd.exe or PowerShell for workflows that spawn native executables. Avoid passing paths containing `=` (and similar MSYS2-sensitive characters) to Symfony Process when operating under Git Bash/MSYS2. Where applicable, configure MSYS2 to disable or restrict argument conversion (e.g. via `MSYS2_ARG_CONV_EXCL`), understanding this may affect other tooling behavior.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00231 14th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed symfony (symfony): 5.4.51, 6.4.33, 7.3.11 +2symfony/process (Packagist): 5.4.51, 6.4.33, 7.3.11 +2+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
symfonysymfonybefore 5.4.51; 6.4.0 to before 6.4.33; 7.3.0 to before 7.3.11; 7.4.0 to before 7.4.5; 8.0.0 to before 8.0.55.4.51, 6.4.33, 7.3.11, 7.4.5, 8.0.5Patch availableCNA
—symfony/process (Packagist)before 5.4.515.4.51Patch availableGHSA-r39x-jcww-82v6
—symfony/process (Packagist)6.4 to before 6.4.336.4.33Patch availableGHSA-r39x-jcww-82v6
—symfony/process (Packagist)7.3 to before 7.3.117.3.11Patch availableGHSA-r39x-jcww-82v6
—symfony/process (Packagist)7.4 to before 7.4.57.4.5Patch availableGHSA-r39x-jcww-82v6
—symfony/process (Packagist)8.0 to before 8.0.58.0.5Patch availableGHSA-r39x-jcww-82v6
—symfony/symfony (Packagist)before 5.4.515.4.51Patch availableGHSA-r39x-jcww-82v6
—symfony/symfony (Packagist)6.4 to before 6.4.336.4.33Patch availableGHSA-r39x-jcww-82v6
—symfony/symfony (Packagist)7.3 to before 7.3.117.3.11Patch availableGHSA-r39x-jcww-82v6
—symfony/symfony (Packagist)7.4 to before 7.4.57.4.5Patch availableGHSA-r39x-jcww-82v6
—symfony/symfony (Packagist)8.0 to before 8.0.58.0.5Patch availableGHSA-r39x-jcww-82v6
  • symfony Vendorsymfony Affected before 5.4.51; 6.4.0 to before 6.4.33; 7.3.0 to before 7.3.11; 7.4.0 to before 7.4.5; 8.0.0 to before 8.0.5 Fixed in 5.4.51, 6.4.33, 7.3.11, 7.4.5, 8.0.5 Patch available CNA
  • symfony/process (Packagist) Vendor— Affected before 5.4.51 Fixed in 5.4.51 Patch available GHSA-r39x-jcww-82v6
  • symfony/process (Packagist) Vendor— Affected 6.4 to before 6.4.33 Fixed in 6.4.33 Patch available GHSA-r39x-jcww-82v6
  • symfony/process (Packagist) Vendor— Affected 7.3 to before 7.3.11 Fixed in 7.3.11 Patch available GHSA-r39x-jcww-82v6
  • symfony/process (Packagist) Vendor— Affected 7.4 to before 7.4.5 Fixed in 7.4.5 Patch available GHSA-r39x-jcww-82v6
  • symfony/process (Packagist) Vendor— Affected 8.0 to before 8.0.5 Fixed in 8.0.5 Patch available GHSA-r39x-jcww-82v6
  • symfony/symfony (Packagist) Vendor— Affected before 5.4.51 Fixed in 5.4.51 Patch available GHSA-r39x-jcww-82v6
  • symfony/symfony (Packagist) Vendor— Affected 6.4 to before 6.4.33 Fixed in 6.4.33 Patch available GHSA-r39x-jcww-82v6
  • symfony/symfony (Packagist) Vendor— Affected 7.3 to before 7.3.11 Fixed in 7.3.11 Patch available GHSA-r39x-jcww-82v6
  • symfony/symfony (Packagist) Vendor— Affected 7.4 to before 7.4.5 Fixed in 7.4.5 Patch available GHSA-r39x-jcww-82v6
  • symfony/symfony (Packagist) Vendor— Affected 8.0 to before 8.0.5 Fixed in 8.0.5 Patch available GHSA-r39x-jcww-82v6

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:*before 5.4.51; 6.4.0 to before 6.4.33; 7.3.0 to before 7.3.11; 7.4.0 to before 7.4.5; 8.0.0 to before 8.0.5Vulnerablesensiolabs
  • cpe:2.3:a:sensiolabs:symfony:*:*:*:*:*:*:*:* Versions before 5.4.51; 6.4.0 to before 6.4.33; 7.3.0 to before 7.3.11; 7.4.0 to before 7.4.5; 8.0.0 to before 8.0.5 Vulnerable ·sensiolabs

Remediation

  • Fix · CNA symfony (symfony) Fixed in 5.4.51, 6.4.33, 7.3.11, 7.4.5, 8.0.5
  • Fix · GHSA-r39x-jcww-82v6 symfony/process (Packagist) Fixed in 5.4.51 Advisory →
  • Fix · GHSA-r39x-jcww-82v6 symfony/process (Packagist) Fixed in 6.4.33 Advisory →
  • Fix · GHSA-r39x-jcww-82v6 symfony/process (Packagist) Fixed in 7.3.11 Advisory →
  • Fix · GHSA-r39x-jcww-82v6 symfony/process (Packagist) Fixed in 7.4.5 Advisory →
  • Fix · GHSA-r39x-jcww-82v6 symfony/process (Packagist) Fixed in 8.0.5 Advisory →
  • Fix · GHSA-r39x-jcww-82v6 symfony/symfony (Packagist) Fixed in 5.4.51 Advisory →
  • Fix · GHSA-r39x-jcww-82v6 symfony/symfony (Packagist) Fixed in 6.4.33 Advisory →
  • Fix · GHSA-r39x-jcww-82v6 symfony/symfony (Packagist) Fixed in 7.3.11 Advisory →
  • Fix · GHSA-r39x-jcww-82v6 symfony/symfony (Packagist) Fixed in 7.4.5 Advisory →
  • Fix · GHSA-r39x-jcww-82v6 symfony/symfony (Packagist) Fixed in 8.0.5 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-24739
  2. 2026-10-03 Alias added: GHSA-r39x-jcww-82v6

References

Exploit 1

Patch 3

Advisory 1

Other 2

  • TI-2024-33775 Ability to change environment from query in symfony/runtime CVSS 3.1HIGH 7.3
  • TI-2026-34283 Twig: The `spaceless` filter implicitly marks its output as safe CVSS 4.0MEDIUM 5.1
  • TI-2022-07667 Code injection in Twig CVSS 3.1CRITICAL 9.8
  • TI-2018-10028 Twig before 2.4.4 allows Server-Side Template Injection (SSTI) via the search search_key… CVSS 3.0CRITICAL 9.8
  • TI-2026-35851 Incorrect authorization in symfony CVSS 4.0HIGH 8.7
  • TI-2026-35264 Improper input validation in symfony CVSS 4.0HIGH 8.3
See all 94 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences