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Fencer Vulns
high 7.5

CVE-2026-13401 json

XML::Bare versions through 0.53 for Perl will hang in an infinite loop when parsing malformed attributes

published 2026-07-16 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-44964

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

XML::Bare versions through 0.53 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.

Patch / fix

  • libxml-bare-perl Debian 14 0.53-5

debian advisories DEBIAN-CVE-2026-13401

  • perl-XML-Bare SLE Module for Development Tools 15 SP7 0.53-150000.3.3.1

suse advisories SUSE-SU-2026:3403-1

  • perl-XML-Bare openSUSE Tumbleweed 0.53-7.1
  • perl-XML-Bare openSUSE Leap 16.0 0.53-bp160.2.1

opensuse advisories openSUSE-SU-2026:11351-1openSUSE-SU-2026:21435-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-13401 updated cvss 7.5

perl-XML-Bare: perl-XML-Bare: Denial of Service via malformed XML attributes

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • CODECHILD XML::Bare

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.