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
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| unaffected |
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Vendor Solution
Upgrade to Cpanel-JSON-XS 4.80 or later.
Tracking
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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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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: CPANSec
Published:
Updated: 2026-10-19T18:11:08.038Z
Reserved: 2026-10-14T13:22:31.904Z
Link: CVE-2026-110672
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2026-10-19T19:17:20.753
Modified: 2026-10-19T20:50:17.967
Link: CVE-2026-110672
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-10-19T20:30:03Z