Cpanel::JSON::XS versions before 4.80 for Perl allow memory exhaustion by buffering incremental input past max_size in incr_parse
Cpanel::JSON::XS versions before 4.80 for Perl allow memory exhaustion by buffering incremental input past max_size in incr_parse. The parser appends each chunk to its buffer. In scalar or list context, it compares max_size with how far it has progressed, not with the buffer length. A chunk that starts with a NUL byte stops the parser before it progresses, and a call in void context skips the check, so the buffer grows without limit. A peer streaming data to an incr_parse consumer can exhaust process memory regardless of max_size.
CVE-2026-110678
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-2026-110678
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": "Cpanel::JSON::XS::incr_parse"
}
]
}
]- Related CVEs
- CVE-2026-110678
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #39686 · Revision 1
- Added to Heist Feed
- Publisher date