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Fencer Intel
medium 6.5

CVE-2026-13593 json

CSS::Minifier::XS versions before 0.14 for Perl have a memory leak when the entire document is minified away

published 4mo ago modified 15d ago also EUVD-2026-40180

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

CSS::Minifier::XS versions before 0.14 for Perl have a memory leak when the entire document is minified away.

The minify function has a memory leak when processing a document containing only characters to be removed, such as comments and whitespace.

Patch / fix

  • GTERMARS CSS::Minifier::XS 0.14
  • libcss-minifier-xs-perl Debian 14 0.14-1

debian advisories DEBIAN-CVE-2026-13593

  • perl-CSS-Minifier-XS openSUSE Tumbleweed 0.140.0-1.1

opensuse advisories openSUSE-SU-2026:11157-1

  • perl-css-minifier-xs Alpine 3.24 0.16-r0

alpine advisories ALPINE-CVE-2026-13593

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2026-13593 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2026-13593 updated cvss 5.3

CSS::Minifier::XS: CSS::Minifier::XS: Memory leak via crafted input leading to Denial of Service

  • 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
4mo ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected products

  • GTERMARS CSS::Minifier::XS

Classification

Weakness
  • CWE-401 Missing Release of Memory after Effective Lifetime

References

Sources

Fencer Intel 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.