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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.

PUBLISHED Reserved 2026-05-08 | Published 2026-05-10 | Updated 2026-05-10 | Assigner CPANSec

Problem types

CWE-125 Out-of-bounds Read

Product status

Default status
unaffected

Any version
affected

Timeline

2026-05-08:Patch submitted in upstream PR.

References

github.com/cpan-authors/XML-LibXML/issues/146 issue-tracking

github.com/cpan-authors/XML-LibXML/pull/149 issue-tracking

github.com/...15652bd905a6c9dda59a81b14d4766adbbae2ea8.patch patch

cve.org (CVE-2026-8177)

nvd.nist.gov (CVE-2026-8177)

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