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VulnerabilityPublished

CVE-2026-13593: GTERMARS CSS::Minifier::XS · Memory Leak

Affects GTERMARS CSS::Minifier::XSSource CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium : upgrade to 0.14 when convenient.

Data as of 12 Nov 2026, 23:24 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.14
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Upgrade CSS::Minifier::XS and CSS-Minifier-XS to 0.14.

Affected software

ProductAffectedFixed in
GTERMARSCSS::Minifier::XSAffected
  • <0.14
Fixed in
  • 0.14
GitHubCSS-Minifier-XSpkg:github/CSS-Minifier-XSOther threatsAffected
  • <0.14
Fixed in
  • 0.14

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, users should consider avoiding minifying CSS documents that consist solely of removable characters or implement external memory management workarounds.

Description

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.

References

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