CVE-2026-110674

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Source
https://cve.org/CVERecord?id=CVE-2026-110674
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-110674.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-110674
Downstream
Published
2026-10-19T18:11:25Z
Modified
2026-10-20T02:44:12Z
Summary
Cpanel::JSON::XS versions from 4.33 before 4.80 for Perl miss duplicate non-ASCII bare keys, allowing type confusion under dupkeys_as_arrayref in decode_hv
Details

Cpanel::JSON::XS versions from 4.33 before 4.80 for Perl miss duplicate non-ASCII bare keys, allowing type confusion under dupkeys_as_arrayref in decode_hv.

With allow_barekey, which relaxed enables, a bare key containing a non-ASCII byte is stored as UTF-8 but looked up as raw bytes, so a repeated key escapes the duplicate-key check and replaces the earlier value.

From 4.41, under dupkeys_as_arrayref, a bare repeat replaces the array that collects a key's values with a plain value, and the next quoted repeat pushes onto that value as if it were an array. A JSON integer there is dereferenced as a pointer.

Untrusted JSON decoded with relaxed and dupkeys_as_arrayref can crash the process or dereference an address chosen by a JSON number.

Database specific 
{
    "cna_assigner":  "CPANSec",
    "cwe_ids":  [
        "CWE-176",
        "CWE-843"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110674.json"
}
References

Affected packages

Git / github.com/rurban/cpanel-json-xs

Affected ranges

Type
GIT
Repo
https://github.com/rurban/cpanel-json-xs
Events
Introduced
1b8988728bc68fdc33a26ef9779e57b37b90775f
Fixed
5552a527abb648d9eb4134e91412800013ddecb9
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "4.33"
        },
        {
            "fixed":  "4.80"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

4.*
4.33
4.34
4.35
4.36
4.37
4.38
4.39
4.40
4.41
4.42
4.43
4.44
4.50
4.51
4.52
4.53

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-110674.json"