CVE-2026-13397

Description

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.

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Weakness Type (CWE)

CWE-835 CWE-835

References

Other 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

Frequently Asked Questions

What is 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.

How do I check if I'm vulnerable to CVE-2026-13397? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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