{"vulnerability": "cve-2026-16221", "sightings": [{"uuid": "1b3e8205-11cc-41c4-933a-a2cfd16d104d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-16221", "type": "seen", "source": "https://bsky.app/profile/ulisesgascon.com/post/3mqyy3s7vts2h", "content": "\ud83d\udea8 High-severity security fix in fast-uri@4.1.1 (also 3.1.4 and 2.4.3 backports) just released!\n\nPatches CVE-2026-16221, host confusion via literal backslash authority delimiter.\n\ngithub.com/fastify/fast...", "creation_timestamp": "2026-07-19T14:22:06.453894Z"}, {"uuid": "b758f6cf-698c-495f-96c7-9797d7049ee2", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-16221", "type": "seen", "source": "https://bsky.app/profile/postac001.bsky.social/post/3mqz5seeo3a2p", "content": "fast-uri\u306e2.3.1\uff5e4.1.0\u3067\u3001\u30d0\u30c3\u30af\u30b9\u30e9\u30c3\u30b7\u30e5\u304c\u30db\u30b9\u30c8\u533a\u5207\u308a\u6587\u5b57\u3068\u3057\u3066\u6271\u308f\u308c\u305a\u3001Node.js\u306eURL\u30d1\u30fc\u30b5\u30fc\u3068\u7570\u306a\u308b\u30db\u30b9\u30c8\u3092\u62bd\u51fa\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u610f\u56f3\u3057\u306a\u3044\u5b9b\u5148\u306b\u8a98\u5c0e\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3002\nCVE-2026-16221 CVSS 7.5 | HIGH", "creation_timestamp": "2026-07-19T16:04:10.448112Z"}, {"uuid": "ccc96c76-977c-4f6d-8c5c-a4058abcd7ac", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-16221", "type": "seen", "source": "https://bsky.app/profile/thehackerwire.bsky.social/post/3mqz5lio7ut2d", "content": "\ud83d\udfe0 CVE-2026-16221 - High (7.5)\n\nImpact: fast-uri versions from 2.3.1 through 4.1.0 (including the 3.x line up to 3.1.3 and the 2....\n\nhttps://www.thehackerwire.com/vulnerability/CVE-2026-16221/\n\n#infosec #cybersecurity #CVE #vulnerability #security #patchstack", "creation_timestamp": "2026-07-19T16:00:20.524179Z"}]}