CVE-2026-24739

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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 \u201cspecial\u201d 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\u2019s 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."}, {"lang": "es", "value": "Symfony es un framework PHP para aplicaciones web y de consola y un conjunto de componentes PHP reutilizables. Antes de las versiones 5.4.51, 6.4.33, 7.3.11, 7.4.5 y 8.0.5, el componente Symfony Process no trataba correctamente algunos caracteres (especialmente '=') como 'especiales' al escapar argumentos en Windows. Cuando PHP se ejecuta desde un entorno basado en MSYS2 (por ejemplo, Git Bash) y Symfony Process genera ejecutables nativos de Windows, la conversi\u00f3n de argumentos/rutas de MSYS2 puede manejar incorrectamente los argumentos sin comillas que contienen estos caracteres. Esto puede hacer que el proceso generado reciba argumentos corruptos/truncados en comparaci\u00f3n con lo que Symfony pretend\u00eda. Si una aplicaci\u00f3n (o herramientas como los scripts de Composer) utiliza Symfony Process para invocar comandos de gesti\u00f3n de archivos (por ejemplo, 'rmdir', 'del', etc.) con un argumento de ruta que contiene '=', la capa de conversi\u00f3n de MSYS2 puede alterar el argumento en tiempo de ejecuci\u00f3n. En configuraciones afectadas, esto puede resultar en operaciones realizadas en una ruta no deseada, incluyendo la eliminaci\u00f3n del contenido de un directorio o unidad m\u00e1s amplio. El problema es particularmente relevante cuando una entrada no confiable puede influir en los argumentos del proceso (directa o indirectamente, por ejemplo, a trav\u00e9s de rutas de repositorio, rutas de archivo extra\u00eddas, directorios temporales o configuraci\u00f3n controlada por el usuario). Las versiones 5.4.51, 6.4.33, 7.3.11, 7.4.5 y 8.0.5 contienen un parche para el problema. Algunas soluciones alternativas est\u00e1n disponibles. Evite ejecutar PHP/sus propias herramientas desde shells basados en MSYS2 en Windows; prefiera cmd.exe o PowerShell para flujos de trabajo que generen ejecutables nativos. Evite pasar rutas que contengan '=' (y caracteres similares sensibles a MSYS2) a Symfony Process cuando opere bajo Git Bash/MSYS2. Cuando sea aplicable, configure MSYS2 para deshabilitar o restringir la conversi\u00f3n de argumentos (por ejemplo, a trav\u00e9s de 'MSYS2_ARG_CONV_EXCL'), entendiendo que esto puede afectar el comportamiento de otras herramientas."}], "id": "CVE-2026-24739", "lastModified": "2026-06-17T10:23:30.817", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.2, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-24739", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-01-29T16:03:49.659737Z", "version": "2.0.3"}}]}, "published": "2026-01-28T21:16:11.750", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/symfony/symfony/commit/35203939050e5abd3caf2202113b00cab5d379b3"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/symfony/symfony/commit/ec154f6f95f8c60f831998ec4d246a857e9d179b"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Issue Tracking", "Patch"], "url": "https://github.com/symfony/symfony/issues/62921"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/symfony/symfony/pull/63164"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/symfony/symfony/security/advisories/GHSA-r39x-jcww-82v6"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-88"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-04-18T14:39:49.856014+00:00", "value": {"mitigation_remediation": ["Upgrade Symfony to version 5.4.51, 6.4.33, 7.3.11, 7.4.5, or 8.0.5 or newer, which includes the missing argument\u2011escaping fix.", "Do not execute PHP or any Symfony\u2011based tooling from Git Bash or any MSYS2\u2011based shell on Windows; use cmd.exe or PowerShell instead.", "Avoid passing paths that contain \u2018=\u2019 (or other MSYS2\u2011sensitive characters) to Symfony Process when operating under Git Bash/MSYS2."], "summary": {"action": "Patch Immediately", "impact": "Local destructive file deletion"}, "threat_synthesis": {"affected_systems": "The issue affects Symfony versions prior to 5.4.51, 6.4.33, 7.3.11, 7.4.5, and 8.0.5. Any application or tooling\u2014such as Composer scripts\u2014that relies on Symfony\u2019s Process component to run Windows executables while operating in an MSYS2 or Git Bash shell on Windows is vulnerable. The affected component is included in the Symfony PHP framework, which is widely used for both web and console PHP applications.", "description_and_impact": "Symfony\u2019s Process component incorrectly escaped certain characters, particularly '=', when generating command-line arguments for native Windows executables in MSYS2\u2011based environments such as Git Bash. The mis\u2011escaping caused the spawned process to receive truncated or altered arguments, which could lead to the execution of file\u2011management commands like rmdir or del on unintended target paths. The outcome is the deletion of data from a broader directory or even an entire drive, representing a severe local destructive file operation.", "risk_and_exploitability": "The risk is primarily local; an attacker must be able to run PHP in an MSYS2\u2011based shell on the target Windows machine and influence the arguments passed to Symfony Process. Because the exploitation relies on untrusted input in a local context, organizations that run Symfony applications from MSYS2 shells or allow dynamic path construction should treat the vulnerability seriously and apply the recommended patches and workarounds promptly. The EPSS score of <1% indicates a very low exploitation probability in the wild, and the vulnerability is not listed in CISA\u2019s KEV catalog."}}}}, "created": "2026-01-29T09:09:10.353890+00:00", "updated": "2026-04-18T14:45:03.138342+00:00", "vendors": ["symfony", "symfony$PRODUCT$symfony"]}