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

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Summary

CVECVE-2026-8177
StatePUBLISHED
AssignerCPANSec
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-10 21:16:30 UTC
Updated2026-05-11 02:16:26 UTC
DescriptionXML::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.

Risk And Classification

Problem Types: CWE-125 | CWE-125 CWE-125 Out-of-bounds Read

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA SHLOMIF XMLLibXML affected 2.0210 custom Not specified

References

ReferenceSourceLinkTags
www.openwall.com/lists/oss-security/2026/05/10/8 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
github.com/cpan-authors/XML-LibXML/issues/146 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
github.com/cpan-authors/XML-LibXML/commit/15652bd905a6c9dda59a81b14d4766... 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
github.com/cpan-authors/XML-LibXML/pull/149 9b29abf9-4ab0-4765-b253-1875cd9b441e github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2026-05-08T00:00:00.000ZPatch submitted in upstream PR.

Solutions

CNA: Upgrade to a future XML::LibXML release, or apply the upstream patch.

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