{"action":"Upgrade ujson to 5.13.0 or later.","affected":[{"fixed":"5.13.0","introduced":"0"}],"component":"ujson","cve_ids":["CVE-2026-54911"],"ecosystem":"PyPI","epss":0.00371,"exploited":false,"fixed_versions":["5.13.0"],"ghsa_id":"GHSA-3j69-69wj-xqx2","id":"tcs_01M5KEW0KPYSQARS6RQ0F1SS98","modified_at":"2026-09-10T03:50:55.310105853Z","published_at":"2026-06-19T20:47:43Z","references":["https://osv.dev/vulnerability/GHSA-3j69-69wj-xqx2","https://github.com/ultrajson/ultrajson/security/advisories/GHSA-3j69-69wj-xqx2","https://nvd.nist.gov/vuln/detail/CVE-2026-54911","https://github.com/ultrajson/ultrajson/commit/169eaf36b1116fece5034ee79a7a0ef3f6deedcf","https://github.com/pypa/advisory-database/tree/main/vulns/ujson/PYSEC-2026-2294.yaml","https://github.com/ultrajson/ultrajson","https://github.com/ultrajson/ultrajson/releases/tag/5.13.0"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GHSA-3j69-69wj-xqx2","url":"https://osv.dev/vulnerability/GHSA-3j69-69wj-xqx2"}],"summary":"UltraJSON: Malformed/Truncated UTF-8 Accepted and Silently Rewritten in ujson.dumps()"}