No exploitation reported

CVE-2026-110672

Cpanel::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

No exploitation reported by the sources we read.

Published2026-10-19
WeaknessCWE-401

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Cpanel::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.

Timeline

dates in UTC

2026-10-1919:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-30 09:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-110672?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-110672?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

CVE-2026-110672 Red Hat Product Security
perl-Cpanel-JSON-XS: Memory leak in decode_hv when rejecting objects

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-30
CISA-ADPSSVC decisionnone2026-10-29
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.5read 2026-10-30
CNAweakness (CWE)CWE-401read 2026-10-30
FIRST EPSSEPSS score0.2 %2026-10-29

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2026-10-19
Last Modified: 2026-10-29
NVD status: Awaiting Analysis

Frequently asked questions

What is CVE-2026-110672?

Is CVE-2026-110672 actively exploited?

Active exploitation of CVE-2026-110672 has not been confirmed. Its EPSS score was 0.2% on 2026-10-29, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-110672?

CVE-2026-110672 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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