CVE catalog
CVE-2026-110684
Cpanel::JSON::XS versions from 3.0202 before 4.80 for Perl leak memory and retain overloaded objects when encoding values as strings in encode_stringify. encode_stringify writes a value in its string
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.17% · Oct 25, 2026
Cpanel::JSON::XS versions from 3.0202 before 4.80 for Perl leak memory and retain overloaded objects when encoding values as strings in encode_stringify. encode_stringify writes a value in its string form under allow_stringify, under convert_blessed for objects without TO_JSON, and under allow_bignum. For an array or hash object with a "" overload, and from 4.20 a scalar object, it takes an extra reference that is never released, so the object and everything it references are never freed. From 4.10 it also never frees its copy of the string. Repeatedly encoding data that contains such values grows process memory without bound.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libcpanel-json-xs-perl | sid | 4.80-1 | fixed |
| Debian | libcpanel-json-xs-perl | forky | 4.80-1 | fixed |
| Debian | libcpanel-json-xs-perl | trixie | 4.39-2~deb13u1 | vulnerable |
| Debian | libcpanel-json-xs-perl | trixie-security | 4.39-2~deb13u1 | vulnerable |
| Debian | libcpanel-json-xs-perl | bookworm | 4.35-1+deb12u1 | vulnerable |
| Debian | libcpanel-json-xs-perl | bookworm-security | 4.35-1+deb12u1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 16.04 | 3.0115-1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 16.04 | 3.0210-1ubuntu1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 18.04 | 3.0225-1build1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 18.04 | 3.0239-1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 20.04 | 4.12-1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 20.04 | 4.12-1build1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 20.04 | 4.15-1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 20.04 | 4.17-1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 20.04 | 4.18-1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 20.04 | 4.19-1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 20.04 | 4.19-1build1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 20.04 | 4.19-1ubuntu0.1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 22.04 | 4.25-1build1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 22.04 | 4.25-1build2 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 22.04 | 4.27-1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 22.04 | 4.27-1build1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 22.04 | 4.27-1ubuntu0.1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 22.04 | 4.27-1ubuntu0.2 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 24.04 | 4.37-1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 24.04 | 4.37-1build1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 24.04 | 4.37-1build2 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 24.04 | 4.37-1build3 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 24.04 | 4.37-1ubuntu0.1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 26.10 | 4.40-1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 26.10 | 4.42-1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 26.10 | 4.42-1build1 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 26.04 | 4.39-2 | vulnerable |
| Ubuntu | libcpanel-json-xs-perl | 26.04 | 4.40-1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libcpanel-json-xs-perl | source | sid | 4.80-1 | not yet assigned | Not reported | Not reported |
| Debian | libcpanel-json-xs-perl | source | forky | 4.80-1 | not yet assigned | Not reported | Not reported |
| Debian | libcpanel-json-xs-perl | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | libcpanel-json-xs-perl | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libcpanel-json-xs-perl]Affected
Details (4)
4.35-1+deb12u1· amd64 · bookwormAffected
nvd · libcpanel-json-xs-perl · debian · bookworm; nvd · libcpanel-json-xs-perl · debian · 12
4.35-1+deb12u1· arm64 · bookwormAffected
nvd · libcpanel-json-xs-perl · debian · bookworm; nvd · libcpanel-json-xs-perl · debian · 12
4.35-1+deb12u1· amd64 · bookworm-securityAffected
nvd · libcpanel-json-xs-perl · debian · bookworm; nvd · libcpanel-json-xs-perl · debian · 12
4.35-1+deb12u1· arm64 · bookworm-securityAffected
nvd · libcpanel-json-xs-perl · debian · bookworm; nvd · libcpanel-json-xs-perl · debian · 12
[Debian 13 (Trixie)]
- [libcpanel-json-xs-perl]Affected
Details (4)
4.39-2~deb13u1· amd64 · trixieAffected
nvd · libcpanel-json-xs-perl · debian · 13
4.39-2~deb13u1· arm64 · trixieAffected
nvd · libcpanel-json-xs-perl · debian · 13
4.39-2~deb13u1· amd64 · trixie-securityAffected
nvd · libcpanel-json-xs-perl · debian · 13
4.39-2~deb13u1· arm64 · trixie-securityAffected
nvd · libcpanel-json-xs-perl · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_12217-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-110684]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-110684]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-110684]
- [https://security-tracker.debian.org/tracker/CVE-2026-110684]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110684.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]