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
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.
CVE-2026-110674
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-110674
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/rurban/Cpanel-JSON-XS",
"modules": [
"Cpanel::JSON::XS"
],
"versions": [
{
"status": "affected",
"version": "4.33",
"lessThan": "4.80",
"versionType": "custom"
}
],
"packageURL": "pkg:cpan/Cpanel-JSON-XS",
"packageName": "Cpanel-JSON-XS",
"programFiles": [
"XS.xs"
],
"collectionURL": "https://cpan.org/modules",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "decode_hv"
}
]
}
]- Related CVEs
- CVE-2026-110674
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #39683 · Revision 1
- Added to Heist Feed
- Publisher date