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.
Release Notes
pallets/jinja (Jinja2)
### [`v3.1.4`](https://togithub.com/pallets/jinja/blob/HEAD/CHANGES.rst#Version-314)
[Compare Source](https://togithub.com/pallets/jinja/compare/3.1.3...3.1.4)
Released 2024-05-05
- The `xmlattr` filter does not allow keys with `/` solidus, `>`
greater-than sign, or `=` equals sign, in addition to disallowing spaces.
Regardless of any validation done by Jinja, user input should never be used
as keys to this filter, or must be separately validated first.
:ghsa:`h75v-3vvj-5mfj`
Configuration
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This PR contains the following updates:
==3.1.3->==3.1.4GitHub Vulnerability Alerts
CVE-2024-34064
The
xmlattrfilter 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
xmlattrfilter, 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.Release Notes
pallets/jinja (Jinja2)
### [`v3.1.4`](https://togithub.com/pallets/jinja/blob/HEAD/CHANGES.rst#Version-314) [Compare Source](https://togithub.com/pallets/jinja/compare/3.1.3...3.1.4) Released 2024-05-05 - The `xmlattr` filter does not allow keys with `/` solidus, `>` greater-than sign, or `=` equals sign, in addition to disallowing spaces. Regardless of any validation done by Jinja, user input should never be used as keys to this filter, or must be separately validated first. :ghsa:`h75v-3vvj-5mfj`Configuration
📅 Schedule: Branch creation - "" (UTC), Automerge - At any time (no schedule defined).
🚦 Automerge: Enabled.
♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.
🔕 Ignore: Close this PR and you won't be reminded about this update again.
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