CVE catalog
CVE-2026-110687
Cpanel::JSON::XS versions from 4.43 before 4.80 for Perl misorder byte-string keys during canonical encoding in utf16_cmp. canonical sorts keys by UTF-16 code units. When any key in a hash is UTF-8 f
- Severity
- Medium · CVSS 5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.17% · Oct 25, 2026
Cpanel::JSON::XS versions from 4.43 before 4.80 for Perl misorder byte-string keys during canonical encoding in utf16_cmp. canonical sorts keys by UTF-16 code units. When any key in a hash is UTF-8 flagged, every key is decoded as UTF-8 for the comparison, including byte-string keys that the encoder writes out as Latin-1 characters. A byte-string key whose bytes are valid UTF-8 is sorted out of order, and two keys that encode differently can compare equal and are left in hash order. The same data can encode to different canonical documents across processes.
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-2026-110687]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-110687]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-110687]
- [https://security-tracker.debian.org/tracker/CVE-2026-110687]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110687.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]