CVE-2026-124539
Last modified
CVE-2026-124539 is a vulnerability of currently unknown severity. 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.
Description
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.
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| — | — | < 4.05 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
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- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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