Vulnerability Description
XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences. A node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read past the end of the input string into adjacent heap memory. Any Perl process that passes attacker controlled strings to XML::LibXML's DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/cpan-authors/XML-LibXML/commit/15652bd905a6c9dda59a81b14d4766
- https://github.com/cpan-authors/XML-LibXML/issues/146
- https://github.com/cpan-authors/XML-LibXML/pull/149
- http://www.openwall.com/lists/oss-security/2026/05/10/8
- http://www.openwall.com/lists/oss-security/2026/05/11/2
FAQ
What is CVE-2026-8177?
CVE-2026-8177 is a vulnerability with a CVSS score of 7.5 (HIGH). XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences. A node name ending in the middle of a multi byte UTF...
How severe is CVE-2026-8177?
CVE-2026-8177 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-8177?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.