Cpanel::JSON::XS versions before 4.80 for Perl use freed filter callbacks when a filter removes itself during decoding in decode_hv
Cpanel::JSON::XS versions before 4.80 for Perl use freed filter callbacks when a filter removes itself during decoding in decode_hv. A decode copies the parser's filter_json_object and filter_json_single_key_object callbacks without taking references to them. A filter callback that removes the last single-key filter frees the callback table while the decode in progress still uses it. The next object is dispatched through freed memory and can crash the process.
CVE-2026-110686
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-2026-110686
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": "0",
"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"
},
{
"name": "decode_json"
}
]
}
]- Related CVEs
- CVE-2026-110686
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #39693 · Revision 1
- Added to Heist Feed
- Publisher date