A quoted key of 24 or more bytes, or one containing a non-ASCII byte or an escape sequence, is decoded into a new scalar. Nothing frees that scalar when the object is rejected for a missing ':' after the key or, from 4.09, for a duplicate key. Duplicate keys are an error unless allow_dupkeys, dupkeys_as_arrayref or relaxed is set.
A process that keeps running after a failed decode retains one key per rejected document, with its size chosen by the sender. Repeated requests exhaust process memory.
Analysis and contextual insights are available on OpenCVE Cloud.
Vendor Solution
Upgrade to Cpanel-JSON-XS 4.80 or later.
Tracking
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No advisories yet.
Thu, 29 Oct 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
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Tue, 20 Oct 2026 00:45:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Rurban
Rurban cpanel::json::xs |
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| 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 leak the decoded key of an object rejected for a duplicate key or a missing colon in decode_hv. A quoted key of 24 or more bytes, or one containing a non-ASCII byte or an escape sequence, is decoded into a new scalar. Nothing frees that scalar when the object is rejected for a missing ':' after the key or, from 4.09, for a duplicate key. Duplicate keys are an error unless allow_dupkeys, dupkeys_as_arrayref or relaxed is set. A process that keeps running after a failed decode retains one key per rejected document, with its size chosen by the sender. Repeated requests exhaust process memory. | |
| Title | Cpanel::JSON::XS versions before 4.80 for Perl leak the decoded key of an object rejected for a duplicate key or a missing colon in decode_hv | |
| Weaknesses | CWE-401 | |
| References |
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Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-10-29T16:33:27.499Z
Reserved: 2026-10-14T13:22:31.904Z
Link: CVE-2026-110672
No data.
Status : Awaiting Analysis
Published: 2026-10-19T19:17:20.753
Modified: 2026-10-29T17:17:59.370
Link: CVE-2026-110672
No data.
OpenCVE Enrichment
Updated: 2026-10-20T00:30:06Z
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CWE-401
Missing Release of Memory after Effective Lifetime