Craft CMS has authenticated path traversal in `assets/icon`, allowing local `.svg` file read
Summary
An authenticated path traversal in assets/icon allows local SVG file read by passing traversal sequences in the extension parameter. The issue is caused by file existence checks happening before extension validation.
Details
The endpoint:
src/controllers/AssetsController.php:1115-1123actionIcon(string $extension)callsAssets::iconPath($extension)and returnssendFile($path, ...).
In Assets::iconPath():
- Path is built from user-controlled
extension:src/helpers/Assets.php:906-909
- If
file_exists($path)is true, path is returned immediately:src/helpers/Assets.php:910-912
Validation exists in Assets::iconSvg():
preg_match('/^\w+$/', $extension)src/helpers/Assets.php:927-931
However, that validation is only reached if iconPath() does not find a file.
So traversal payloads that resolve to existing .svg files bypass validation and are served by sendFile().
Impact
- Authenticated users can read local .svg files accessible to the application process.
References
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de Composer | craftcms/cms | >= 4.0.0-RC1, < 4.17.7, >= 5.0.0-RC1, < 5.9.13 | 4.17.7, 5.9.13 |
Referencias
- https://github.com/craftcms/cms/security/advisories/GHSA-c43v-4cr8-6mvp
- https://nvd.nist.gov/vuln/detail/CVE-2026-56394
- https://github.com/craftcms/cms/commit/30f5f1a8d6edf0f3a00be72c42c78d9dc7d72d5c
- https://github.com/craftcms/cms
- https://www.vulncheck.com/advisories/craft-cms-authenticated-path-traversal-in-assets-icon-extension-parameter
- Vector CVSS
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N- Debilidad (CWE)
CWE-22- Plataforma
- Composer
- Paquete
craftcms/cms- Publicada
- 09.07.2026
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-c43v-4cr8-6mvp - CC BY 4.0
Historial de vulnerabilidades: craftcms/cms
Todas las vulnerabilidades publicadas de este paquete (Paquete de Composer), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 127
- Primera → última
- 07.2021 08.2026
- Sin corrección
- 6
- Explotada en ataques
- 4
Distribución por gravedad
- Crítica 9
- Alta 41
- Media 65
- Baja 12
Divulgaciones por año
- 2021: 3
- 2022: 22
- 2023: 13
- 2024: 9
- 2025: 6
- 2026: 74
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Craft CMS has authenticated path traversal in `assets/icon`, allowing local `.svg` file read esta entrada
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