{"id":"EM-20261110-RRLZ","url":"https://cyber.eventmonitor.net/incident/EM-20261110-RRLZ/css-parsing-vulnerability-cve-2026-124950/","type":"cve","title":"CSS Parsing Vulnerability (CVE-2026-124950)","subtitle":"CVE-2026-124950","subject":"CVE-2026-124950","status":"Developing","severity":"medium","affected":[],"headline":null,"born":"2026-11-10T15:33:36.000Z","firstSignal":"2026-11-10T13:29:01.000Z","lastSignal":"2026-11-10T15:33:36.000Z","updated":"2026-11-12T00:31:06.720Z","revision":1,"life":[{"status":"Born","at":"2026-11-10T15:33:36.000Z","why":"second independent source: C29 CIRCL Vulnerability-Lookup"},{"status":"Developing","at":"2026-11-10T15:33:36.000Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-11-10T13:29:01.000Z","what":"First signal: C41 Red Hat Security Data"},{"at":"2026-11-10T15:33:36.000Z","what":"Born: second source, C29 CIRCL Vulnerability-Lookup. Page EM-20261110-RRLZ created."},{"at":"2026-11-10T15:33:36.000Z","what":"Severity raised to Medium by C29"}],"stages":[{"name":"Disclosed","at":"2026-11-10T14:17:29.360Z","detail":"C6 NVD published"},{"name":"Scored","at":null,"detail":"No CVSS yet"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":"2026-11-10T13:29:01.000Z","detail":"C41 published"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-11-10T13:29:01.000Z","source":"C41","sourceName":"Red Hat Security Data","role":"Vendor","severity":1,"title":"Red Hat: CVE-2026-124950 (low)","text":"firefox: thunderbird: Same-origin policy bypass in the CSS Parsing and Computation component","url":"https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-124950.json"},{"at":"2026-11-10T15:33:36.000Z","source":"C29","sourceName":"CIRCL Vulnerability-Lookup","role":"Database","severity":2,"title":"GHSA-g2m3-vrpf-c93g / CVE-2026-124950","text":"Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160.","url":"https://vulnerability.circl.lu/vuln/GHSA-g2m3-vrpf-c93g"}],"crowd":[],"reference":{"nvd":{"published":"2026-11-10T14:17:29.360","score":null,"severity":"","desc":"Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160 and Thunderbird 160.","product":"","seen":1794345886420},"kev":null,"epss":null,"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}