CVE-2026-49825
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux ausnutzen, um Sicherheitsvorkehrungen zu umgehen.
CSIRTS triage
- What
- The Cleaner component in lxml fails to properly sanitize javascript: URLs in xlink:href attributes, allowing XSS injection.
- Who is affected
- Applications using lxml's Cleaner to sanitize HTML/XML with SVG content.
- Urgency
- High severity (CVSS 8.2) but not yet exploited; patching should be prioritized within standard maintenance windows.
- Action
- Update lxml to a patched version that properly removes or sanitizes javascript: URLs in xlink:href attributes.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.24% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 15% of all EPSS-scored CVEs.
Advisory coverage (4)
- high[UPDATE] [hoch] Red Hat Enterprise Linux (lxml): Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungencert-bund · 2026-09-11
- highCVE-2026-49825: lxml is a library for processing XML and HTML in the Python language. Prior to 6.1.1, link att…nvd · 2026-08-20
- highCVE-2026-49825: lxml: javascript: URL bypass in Cleaner via xlink:hrefmsrc · 2026-08-11
- highGHSA-4jhm-jv67-739f: `lxml_html_clean.Cleaner` does not strip `javascript:` URLs from namespaced URL attribute…ghsa · 2026-07-08
External references
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