In aiohttp, compressed files as symlinks are not protected from path traversal
Summary
Static routes which contain files with compressed variants (.gz or .br extension) were vulnerable to path traversal outside the root directory if those variants are symbolic links.
Details
The server protects static routes from path traversal outside the root directory when follow_symlinks=False (default). It does this by resolving the requested URL to an absolute path and then checking that path relative to the root. However, these checks are not performed when looking for compressed variants in the FileResponse class, and symbolic links are then automatically followed when performing Path.stat() and Path.open() to send the file.
Impact
Servers with static routes that contain compressed variants as symbolic links, pointing outside the root directory, or that permit users to upload or create such links, are impacted.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | aiohttp | >= 3.10.0b1, < 3.10.2 | 3.10.2 |
Referencias
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-jwhx-xcg6-8xhj
- https://nvd.nist.gov/vuln/detail/CVE-2024-42367
- https://github.com/aio-libs/aiohttp/pull/8653
- https://github.com/aio-libs/aiohttp/commit/ce2e9758814527589b10759a20783fb03b98339f
- https://github.com/aio-libs/aiohttp
- https://github.com/aio-libs/aiohttp/blob/e0ff5246e1d29b7710ab1a2bbc972b48169f1c05/aiohttp/web_fileresponse.py#L177
- https://github.com/aio-libs/aiohttp/blob/e0ff5246e1d29b7710ab1a2bbc972b48169f1c05/aiohttp/web_urldispatcher.py#L674
- https://pypi.org/project/aiohttp
- https://github.com/advisories/GHSA-jwhx-xcg6-8xhj
- Vector CVSS
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N- Debilidad (CWE)
CWE-61- Plataforma
- Python (PyPI)
- Paquete
aiohttp- Publicada
- 09.08.2024
- Actualizado
- 11.10.2026 15:17
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2026-1108 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-jwhx-xcg6-8xhj - CC BY 4.0
Historial de vulnerabilidades: aiohttp
Todas las vulnerabilidades publicadas de este paquete (Python (PyPI)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 55
- Primera → última
- 02.2021 10.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 7
- Media 29
- Baja 19
Divulgaciones por año
- 2021: 1
- 2022: 0
- 2023: 6
- 2024: 7
- 2025: 1
- 2026: 40
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