CVE-2026-24739
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.
| Software | From | Fixed in |
|---|---|---|
| sensiolabs / symfony | - | 5.4.51 |
| sensiolabs / symfony | 6.4.0 | 6.4.33 |
| sensiolabs / symfony | 7.3.0 | 7.3.11 |
| sensiolabs / symfony | 7.4.0 | 7.4.5 |
| sensiolabs / symfony | 8.0.0 | 8.0.5 |
symfony / process
|
- | 5.4.51 |
|
symfony / process
|
6.4 | 6.4.33 |
|
symfony / process
|
7.3 | 7.3.11 |
|
symfony / process
|
7.4 | 7.4.5 |
|
symfony / process
|
8.0 | 8.0.5 |
|
symfony / symfony
|
- | 5.4.51 |
|
symfony / symfony
|
6.4 | 6.4.33 |
|
symfony / symfony
|
7.3 | 7.3.11 |
|
symfony / symfony
|
7.4 | 7.4.5 |
|
symfony / symfony
|
8.0 | 8.0.5 |
- https://github.com/symfony/symfony/commit/35203939050e5abd3caf2202113b00cab5d379b3
- https://github.com/symfony/symfony/commit/ec154f6f95f8c60f831998ec4d246a857e9d179b
- https://github.com/symfony/symfony/issues/62921
- https://github.com/symfony/symfony/pull/63164
- https://github.com/symfony/symfony/security/advisories/GHSA-r39x-jcww-82v6
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A security vulnerability is a weakness in software, hardware, or configuration that can be exploited to compromise confidentiality, integrity, or availability. Many vulnerabilities are tracked as CVEs (Common Vulnerabilities and Exposures), which provide a standardized identifier so teams can coordinate patching, mitigation, and risk assessment across tools and vendors.
CVSS (Common Vulnerability Scoring System) estimates technical severity, but it doesn't automatically equal business risk. Prioritize using context like internet exposure, affected asset criticality, known exploitation (proof-of-concept or in-the-wild), and whether compensating controls exist. A "Medium" CVSS on an exposed, production system can be more urgent than a "Critical" on an isolated, non-production host.
A vulnerability is the underlying weakness. An exploit is the method or code used to take advantage of it. A zero-day is a vulnerability that is unknown to the vendor or has no publicly available fix when attackers begin using it. In practice, risk increases sharply when exploitation becomes reliable or widespread.
Recurring findings usually come from incomplete Asset Discovery, inconsistent patch management, inherited images, and configuration drift. In modern environments, you also need to watch the software supply chain: dependencies, containers, build pipelines, and third-party services can reintroduce the same weakness even after you patch a single host. Unknown or unmanaged assets (often called Shadow IT) are a common reason the same issues resurface.
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