Cpanel::JSON::XS versions from 4.20 before 4.80 for Perl write out of bounds when a tied or shared hash grows during canonical encoding in encode_hv
Cpanel::JSON::XS versions from 4.20 before 4.80 for Perl write out of bounds when a tied or shared hash grows during canonical encoding in encode_hv. With canonical, the keys of a tied or threads::shared hash are counted before a second pass collects them for sorting. The encoder uses a fixed 64-entry stack array or, for larger counts, a heap array sized from the first pass. If the second pass exceeds that capacity, entries are written out of bounds before the counts are compared. This corrupts stack or heap memory and can crash the process.
CVE-2026-110680
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-2026-110680
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": "4.20",
"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": "encode_hv"
}
]
}
]- Related CVEs
- CVE-2026-110680
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #39688 · Revision 1
- Added to Heist Feed
- Publisher date