https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-01T20:39:04.827373+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2026-44660 CVE-2026-44660 — UltraJSON: Memory Leak in ujson.dump() on Write Failure 2026-10-01T20:39:04.838956+00:00

Affected: ultrajson

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.