CVE-2026-110672

NameCVE-2026-110672
DescriptionCpanel::JSON::XS versions before 4.80 for Perl leak the decoded key of an object rejected for a duplicate key or a missing colon in decode_hv. A quoted key of 24 or more bytes, or one containing a non-ASCII byte or an escape sequence, is decoded into a new scalar. Nothing frees that scalar when the object is rejected for a missing ':' after the key or, from 4.09, for a duplicate key. Duplicate keys are an error unless allow_dupkeys, dupkeys_as_arrayref or relaxed is set. A process that keeps running after a failed decode retains one key per rejected document, with its size chosen by the sender. Repeated requests exhaust process memory.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libcpanel-json-xs-perl (PTS)bookworm, bookworm (security)4.35-1+deb12u1vulnerable
trixie (security), trixie4.39-2~deb13u1vulnerable
forky, sid4.80-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libcpanel-json-xs-perlsource(unstable)4.80-1

Notes

https://lists.security.metacpan.org/cve-announce/msg/44479703/
Fixed by: https://github.com/rurban/Cpanel-JSON-XS/commit/532b53cf8d2ca5ab6bc24048325566d1f7132425 (4.80)

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