CVE-2026-110681
Cpanel::JSON::XS versions before 4.80 for Perl use the parent interpreter's scalars from a parser object cloned into a new ithread
Unknown productApplications & CMS
CVSS
NoneNot scoredExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.17%Chance of exploitation activity in the next 30 days, higher than 6% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 4.80CVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
Cpanel::JSON::XS versions before 4.80 for Perl use the parent interpreter's scalars from a parser object cloned into a new ithread.
A parser object holds its callbacks and its incremental parse buffer as raw scalar pointers. When a thread is created, these are copied into the new interpreter unchanged, so the child's parser uses, and later frees, scalars that belong to the parent and may already have been freed there.
A parser created before a thread starts and used inside it can call freed callbacks, corrupt reference counts and crash the process.
Text from CVE List
Affected versions 1
- Productaffected: all versions before 4.80CVE List