CVE-2026-8177

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/cpan-authors/XML-LibXML/commit/15652bd905a6c9dda59a81b14d4766adbbae2ea8.patch
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

Configurations

No configuration.

History

11 May 2026, 18:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
References		() http://www.openwall.com/lists/oss-security/2026/05/11/2 -

11 May 2026, 02:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/05/10/8 -

11 May 2026, 00:16

Type	Values Removed	Values Added
References		() https://github.com/cpan-authors/XML-LibXML/pull/149 -

10 May 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-10 21:16

Updated : 2026-06-17 11:03

NVD link : CVE-2026-8177

Mitre link : CVE-2026-8177

CVE.ORG link : CVE-2026-8177

JSON object : View

Products Affected

No product.

CWE

CWE-125

Out-of-bounds Read

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