{"id":"EM-20261109-426N","url":"https://cyber.eventmonitor.net/incident/EM-20261109-426N/omniauth-vulnerability-cve-2026-63183/","type":"cve","title":"OmniAuth Vulnerability (CVE-2026-63183)","subtitle":"CVE-2026-63183","subject":"CVE-2026-63183","status":"Developing","severity":"medium","affected":[],"headline":null,"born":"2026-11-09T21:49:04.000Z","firstSignal":"2026-11-04T19:07:04.000Z","lastSignal":"2026-11-09T21:49:04.000Z","updated":"2026-11-09T22:10:41.103Z","revision":1,"life":[{"status":"Born","at":"2026-11-09T21:49:04.000Z","why":"second independent source: C26 GitHub Advisory Database"},{"status":"Developing","at":"2026-11-09T21:49:04.000Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-04T19:07:04.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-09T21:49:04.000Z","what":"Born: second source, C26 GitHub Advisory Database. Page EM-20261109-426N created."}],"stages":[{"name":"Disclosed","at":"2026-11-04T19:17:40.650Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-11-04T19:17:40.650Z","detail":"CVSS 6.9 · EPSS 0.2%"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-04T19:07:04.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-04T19:07:04.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":2,"title":"Red Hat: CVE-2026-63183 (moderate)","text":"omniauth: OmniAuth: Host header injection via forged HTTP Host header","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-63183.json"},{"at":"2026-11-09T21:49:04.000Z","source":"C26","sourceName":"GitHub Advisory Database","role":"Database","severity":2,"title":"GHSA-m27g-v28p-f9fx / CVE-2026-63183: OmniAuth: Host Header Injection Vulnerability","text":"rubygems:omniauth","url":"https://github.com/advisories/GHSA-m27g-v28p-f9fx"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-04T19:17:40.650","score":6.9,"severity":"MEDIUM","desc":"OmniAuth is a flexible authentication system utilizing Rack middleware. Prior to 2.2.0, OmniAuth derives provider callback URLs from request-controlled host information when neither a fixed full_host nor framework-level incoming host validation is configured. A remote unauthenticated client can…","product":"","seen":1793917591435},"kev":null,"epss":{"epss":0.00181,"pct":0.0774,"at":1793967405734},"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}