VDB
PYSEC-2021-852
PYSEC-2021-852
PUBLISHED
lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should upgrade to lxml 4.6.5 to receive a patch. There are no known workarounds available.
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| PyPI | lxml | 3.2.4, 0.9, 0 |
Timeline
- Dec 13, 2021 CVE Published
- Apr 9, 2026 CVE Updated
References
- https://github.com/lxml/lxml/security/advisories/GHSA-55x5-fj6c-h6m8 advisory
- https://github.com/lxml/lxml/commit/f2330237440df7e8f39c3ad1b1aa8852be3b27c0 fix
- https://github.com/lxml/lxml/commit/a3eacbc0dcf1de1c822ec29fb7d090a4b1712a9c#diff-59130575b4fb2932c957db2922977d7d89afb0b2085357db1a14615a2fcad776 fix
- https://github.com/lxml/lxml/commit/12fa9669007180a7bb87d990c375cf91ca5b664a fix