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

Overview

Severity

High (CVSS 7.5)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U

Exploit Status

Not Exploited

Patch Tuesday

2026-May

Released

2026-05-13

Last Updated

2026-06-03

EPSS Score

0.47% (percentile: 37.4%)

Affected Products (2)

Other

• 21334-17084
• 21434-17084

Revision History

• 2026-05-13: Information published.
• 2026-05-25: Information published.
• 2026-06-03: Information published.