What’s Vulnerable › Vulnerabilities

CVE-2026-13397: HTML::Bare versions through 0.04 for Perl will hang in an infinite loop when parsing malformed attributes

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-16 · updated 2026-10-24
• Weakness: CWE-835

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.

Affected products

• CODECHILD HTML::Bare: through 0.04

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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