{"action":"Upgrade pycti to 6.8.16 or later.","affected":[{"fixed":"6.8.16","introduced":"0"}],"component":"pycti","cve_ids":["CVE-2026-21887"],"ecosystem":"PyPI","epss":0.00226,"exploited":false,"fixed_versions":["6.8.16"],"ghsa_id":"GHSA-ffm6-vvph-g5f5","id":"tcs_01M5KGR1G9AFWYZMD5PM1T49Q8","modified_at":"2026-05-20T09:19:14.733128Z","published_at":"2026-03-12T17:16:36.813Z","references":["https://osv.dev/vulnerability/PYSEC-2026-118","https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-ffm6-vvph-g5f5"],"severity":{"label":"high","score":7.7},"sources":[{"source":"osv","source_id":"PYSEC-2026-118","url":"https://osv.dev/vulnerability/PYSEC-2026-118"}],"summary":"OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 6.8.16, the OpenCTI platform’s data ingestion feature accepts user-supplied URLs without v"}