Vulnerability record/PUBLISHED/Published Nov 14, 2026 11:52:36 UTC
CVE-2026-124539
JSON::XS versions before 4.05 for Perl leak the decoded key of an object rejected for a missing colon in decode_hv. Unless it is short plain ASCII, a quoted key is decoded into a new scalar. Nothing frees that scalar when the object is rejected for a missing ':' after the key. 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.
Base scoreN/A/ 10
SeverityNoneCVSS unscored
Exploitability / impact
CVSS metric breakdown
Base severityNone
No CVSS vector is available for this record.
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Record context
CVE Numbering AuthorityCPANSec
Last updatedNov 14, 2026 11:52:36 UTC
PublishedNov 14, 2026 11:52:36 UTC
ReservedNov 8, 2026 12:32:19 UTC