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VulnerabilityPublished Updated

CVE-2026-110685: Libcpanel json xs perl · Cpanel::JSON::XS versions before 4.80 for Perl leak the decoded arguments of

Affects libcpanel-json-xs-perlSource GCVE Database

0
Authoritative record:CVE-2026-110685· Medium

Not known to be exploited.

Data as of 29 Oct 2026, 00:00 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10libcpanel-json-xs-perlpkg:deb/ubuntu/libcpanel-json-xs-perl?arch=source&distro=stonkingOther threatsAffected
  • =4.40-1
  • =4.42-1
  • =4.42-1build1
Fixed in–
Ubuntu 26.04 LTSlibcpanel-json-xs-perlpkg:deb/ubuntu/libcpanel-json-xs-perl?arch=source&distro=resoluteOther threatsAffected
  • =4.39-2
  • =4.40-1
Fixed in–
Ubuntu 24.04 LTSlibcpanel-json-xs-perlpkg:deb/ubuntu/libcpanel-json-xs-perl?arch=source&distro=nobleOther threatsAffected
  • 4.37-1 – 4.37-1ubuntu0.1
5 affected builds
Fixed in–
Ubuntu 22.04 LTSlibcpanel-json-xs-perlpkg:deb/ubuntu/libcpanel-json-xs-perl?arch=source&distro=jammyOther threatsAffected
  • 4.25-1build1 – 4.27-1ubuntu0.2
6 affected builds
Fixed in–
Ubuntu 20.04 LTSlibcpanel-json-xs-perlpkg:deb/ubuntu/libcpanel-json-xs-perl?arch=source&distro=focalOther threatsAffected
  • 4.12-1 – 4.19-1ubuntu0.1
8 affected builds
Fixed in–
Ubuntu 18.04 LTSlibcpanel-json-xs-perlpkg:deb/ubuntu/libcpanel-json-xs-perl?arch=source&distro=bionicOther threatsAffected
  • =3.0225-1build1
  • =3.0239-1
Fixed in–

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

AI-suggested

Upgrade to Cpanel::JSON::XS version 4.80 or later, where this memory leak issue is fixed. No other mitigation or temporary workaround is indicated in the available data.

Description

Cpanel::JSON::XS versions before 4.80 for Perl have a memory leak vulnerability where decoded arguments of a tagged value are leaked if the THAW method dies during decode_tag. This occurs because the decoded class name and argument array are only released after THAW returns, so an error in THAW causes the decoded argument structure to remain allocated. An attacker can exploit this by sending specially crafted documents that cause repeated errors, leading to memory exhaustion in the process.

References

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