Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
UltraJSON is a fast JSON encoder and decoder written in pure C with bindings for Python 3.7+. Prior to 5.12.1, when ujson.dump() writes to a file-like object and the write operation raises an exception, the serialized JSON string object is not decremented, leaking memory. Each failed write operation leaks the full size of the serialized payload. This vulnerability is fixed in 5.12.1.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
AVAILABLE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
🟠 #Python UltraJSON, Memory Leak (ujsondump write failure), #CVE-2026-44660 (Medium) https://dailycve.com/python-ultrajson-memory-leak-ujsondump-write-failure-cve-2026-44660-medium/
Post summary
The tweet highlights a newly disclosed Medium‑severity memory‑leak vulnerability (CVE‑2026‑44660) in Python's UltraJSON library, providing only a brief description and severity rating.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | ultrajson_project | ultrajson | - | python | - |