{"action":"Upgrade ujson to 5.12.1 or later.","affected":[{"fixed":"5.12.1","introduced":"0"}],"component":"ujson","cve_ids":["CVE-2026-44660"],"ecosystem":"PyPI","epss":0.00644,"exploited":false,"fixed_versions":["5.12.1"],"ghsa_id":"GHSA-c38f-wx89-p2xg","id":"tcs_01M5KGYKGQK8D0SQJFVRV1RPPC","modified_at":"2026-07-13T07:15:45.423783162Z","published_at":"2026-05-27T21:16:17.650Z","references":["https://osv.dev/vulnerability/PYSEC-2026-2293","https://github.com/ultrajson/ultrajson/releases/tag/5.12.1","https://github.com/ultrajson/ultrajson/commit/82af1d0ac01d09aa40c887b460d44b9d9f4bccd9","https://github.com/ultrajson/ultrajson/security/advisories/GHSA-c38f-wx89-p2xg"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-2293","url":"https://osv.dev/vulnerability/PYSEC-2026-2293"}],"summary":"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 exceptio"}