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 spaces. XML/HTML attributes cannot contain spaces, as each would then be interpreted as 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. Note that accepting keys as user input is not common or a particularly intended use case of the xmlattr filter, and an application doing so should already be verifying what keys are provided regardless of this fix.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | jinja2 | < 3.1.3 | 3.1.3 |
References
- https://github.com/pallets/jinja/security/advisories/GHSA-h5c8-rqwp-cp95
- https://nvd.nist.gov/vuln/detail/CVE-2024-22195
- https://github.com/pallets/jinja/commit/716795349a41d4983a9a4771f7d883c96ea17be7
- https://github.com/pallets/jinja
- https://github.com/pallets/jinja/releases/tag/3.1.3
- https://lists.debian.org/debian-lts-announce/2024/01/msg00010.html
- https://lists.debian.org/debian-lts-announce/2024/12/msg00009.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5XCWZD464AJJJUBOO7CMPXQ4ROBC6JX2
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DELCVUUYX75I5K4Q5WMJG4MUZJA6VAIP
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/O7YWRBX6JQCWC2XXCTZ55C7DPMGICCN3
- https://pypi.org/project/jinja2
- https://github.com/advisories/GHSA-h5c8-rqwp-cp95
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N- Weakness (CWE)
CWE-79- Platform
- Python (PyPI)
- Package
jinja2- Disclosed
- 11.01.2024
- Updated
- 11.10.2026 15:17
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2026-1473 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-h5c8-rqwp-cp95 - CC BY 4.0
Vulnerability history: jinja2
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 11
- First → latest
- 05.2014 06.2025
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- High 4
- Medium 7
Disclosures per year
- 2017: 0
- 2018: 0
- 2019: 2
- 2020: 0
- 2021: 1
- 2022: 0
- 2023: 0
- 2024: 4
- 2025: 2
- 2026: 0
earlier: 2
-
Jinja vulnerable to HTML attribute injection when passing user input as keys to xmlattr filter this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.