Jinja has a sandbox breakout through indirect reference to format method
An oversight in how the Jinja sandboxed environment detects calls to str.format allows an attacker that controls the content of a template to execute arbitrary Python code.
To exploit the vulnerability, an attacker needs to control the content of a template. Whether that is the case depends on the type of application using Jinja. This vulnerability impacts users of applications which execute untrusted templates.
Jinja's sandbox does catch calls to str.format and ensures they don't escape the sandbox. However, it's possible to store a reference to a malicious string's format method, then pass that to a filter that calls it. No such filters are built-in to Jinja, but could be present through custom filters in an application. After the fix, such indirect calls are also handled by the sandbox.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | jinja2 | < 3.1.5 | 3.1.5 |
Referencias
- https://github.com/pallets/jinja/security/advisories/GHSA-q2x7-8rv6-6q7h
- https://nvd.nist.gov/vuln/detail/CVE-2024-56326
- https://github.com/pallets/jinja/commit/48b0687e05a5466a91cd5812d604fa37ad0943b4
- https://github.com/pallets/jinja
- https://github.com/pallets/jinja/releases/tag/3.1.5
- https://lists.debian.org/debian-lts-announce/2025/04/msg00022.html
- https://pypi.org/project/jinja2
- https://github.com/advisories/GHSA-q2x7-8rv6-6q7h
- Vector CVSS
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Debilidad (CWE)
CWE-693- Plataforma
- Python (PyPI)
- Paquete
jinja2- Publicada
- 23.12.2024
- Actualizado
- 11.10.2026 15:17
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2026-1475 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-q2x7-8rv6-6q7h - CC BY 4.0
Historial de vulnerabilidades: jinja2
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
- 11
- Primera → última
- 05.2014 06.2025
- Sin corrección
- 1
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 4
- Media 7
Divulgaciones por año
- 2017: 0
- 2018: 0
- 2019: 2
- 2020: 0
- 2021: 1
- 2022: 0
- 2023: 0
- 2024: 4
- 2025: 2
- 2026: 0
antes: 2
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Jinja has a sandbox breakout through indirect reference to format method esta entrada
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