Jinja vulnerable to HTML attribute injection when passing user input as keys to xmlattr filter
The xmlattr filter in affected versions of Jinja accepts keys containing non-attribute characters. XML/HTML attributes cannot contain spaces, /, >, or =, as each would then be interpreted as starting a separate attribute. If an application accepts keys (as opposed to only values) as user input, and renders these in pages that other users see as well, an attacker could use this to inject other attributes and perform XSS. The fix for the previous GHSA-h5c8-rqwp-cp95 CVE-2024-22195 only addressed spaces but not other characters.
Accepting keys as user input is now explicitly considered an unintended use case of the xmlattr filter, and code that does so without otherwise validating the input should be flagged as insecure, regardless of Jinja version. Accepting values as user input continues to be safe.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Python (PyPI) | jinja2 | < 3.1.4 | 3.1.4 |
Referencias
- https://github.com/pallets/jinja/security/advisories/GHSA-h75v-3vvj-5mfj
- https://nvd.nist.gov/vuln/detail/CVE-2024-34064
- https://github.com/pallets/jinja/commit/0668239dc6b44ef38e7a6c9f91f312fd4ca581cb
- https://github.com/pallets/jinja
- https://lists.debian.org/debian-lts-announce/2024/12/msg00009.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/567XIGSZMABG6TSMYWD7MIYNJSUQQRUC
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GCLF44KY43BSVMTE6S53B4V5WP3FRRSE
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SSCBHIL6BYKR5NRCBXP4XMP2CEEKGFVS
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZALNWE3TXPPHVPSI3AZ5CTMSTAVN5UMS
- https://pypi.org/project/jinja2
- https://github.com/advisories/GHSA-h75v-3vvj-5mfj
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N- Debilidad (CWE)
CWE-79- Plataforma
- Python (PyPI)
- Paquete
jinja2- Publicada
- 06.05.2024
- Actualizado
- 11.10.2026 15:17
Fuentes y licencias
OSV / GitHub Advisory Database - PYSEC-2026-1474 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-h75v-3vvj-5mfj - 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 vulnerable to HTML attribute injection when passing user input as keys to xmlattr filter esta entrada
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