Answer in brief
CVE-2026-49825 records a High severity vulnerability in lxml: javascript: URL bypass in Cleaner via xlink:href. The current sources do not mark it as known exploited. The current feed maps lxml/lxml (generic), fedora-python/lxml_html_clean (generic), lxml_html_clean (pip). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps lxml/lxml (generic), fedora-python/lxml_html_clean (generic), lxml_html_clean (pip). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| lxml/lxmlgeneric | < 6.1.1 | Not reported |
| fedora-python/lxml_html_cleangeneric | < 0.4.5 | Not reported |
| lxml_html_cleanpip | <0.4.5 | 0.4.5 |
Published upstream
Aug 20, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 20, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 8, 2026
lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.1, link attributes in ``lxml.html.defs.link_attrs`` were missing ``xlink:href``, which can be used for URL bypass attacks in embedded SVG/MathML/etc. content. This vulnerability was fixed in lxml 6.1.1 and lxml_html_clean 0.4.5.
Quoted source text, attributed separately from HOL analysis.