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.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Rurban |
|
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References
History
Mon, 19 Oct 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Rurban
Rurban cpanel::json::xs |
|
| Vendors & Products |
Rurban
Rurban cpanel::json::xs |
Mon, 19 Oct 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Cpanel::JSON::XS versions before 4.80 for Perl allow memory exhaustion by buffering incremental input past max_size in incr_parse | |
| Weaknesses | CWE-770 | |
| References |
|
MITRE
Status: PUBLISHED
Assigner: CPANSec
Published: 2026-10-19T18:11:58.610Z
Updated: 2026-10-19T18:11:58.610Z
Reserved: 2026-10-14T13:24:56.803Z
Link: CVE-2026-110678
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2026-10-19T19:17:21.550
Modified: 2026-10-19T20:50:17.967
Link: CVE-2026-110678
Redhat
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