CVE-2026-13397

HTML::Bare versions through 0.04 for Perl will hang in an infinite loop when parsing malformed attributes. The parserc_parse function never advances the attribute-parse state cursor on certain malformed attribute forms, looping forever. Nameless attributes such as "<a ='c'>" or unbalanced quotes "<a b='''''''c'>" can trigger this condition. Note that the latest version available on CPAN is version 0.02. Newer versions are available on the git repository.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.6% chance of exploitation in the next 30 days; higher than 48% of CVEs (scores of 2026-10-25)

CWE

CWE-835

Published

2026-07-16

Modified

2026-10-24

Record from

the NVD, synced 2026-10-25

References

• https://github.com/nanoscopic/perl-HTML-Bare/pull/1
• https://security.metacpan.org/patches/H/HTML-Bare/0.02/CVE-2026-13397-r1.patch
• http://www.openwall.com/lists/oss-security/2026/07/16/4

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