{"id":"EM-20261103-FUFI","url":"https://cyber.eventmonitor.net/incident/EM-20261103-FUFI/","type":"cve","title":"Metalama Vulnerability (CVE-2026-62848)","subtitle":"CVE-2026-62848","subject":"CVE-2026-62848","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-11-03T16:37:44.000Z","firstSignal":"2026-10-30T21:17:13.957Z","lastSignal":"2026-11-03T16:37:44.000Z","updated":"2026-11-04T14:43:58.877Z","revision":1,"life":[{"status":"Born","at":"2026-11-03T16:37:44.000Z","why":"second independent source: C26 GitHub Advisory Database"},{"status":"Developing","at":"2026-11-03T16:37:44.000Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-10-30T21:17:13.957Z","what":"First signal: C6 NVD CVE API 2.0"},{"at":"2026-11-03T16:37:44.000Z","what":"Born: second source, C26 GitHub Advisory Database. Page EM-20261103-FUFI created."}],"stages":[{"name":"Disclosed","at":"2026-10-30T21:17:13.957Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-10-30T21:17:13.957Z","detail":"CVSS 7.3 · EPSS 0.2%"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":null,"detail":"None in sources yet"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-10-30T21:17:13.957Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-62848 (CVSS 7.3)","text":"Metalama is a Roslyn-based open-source patterns and architecture toolkit for C#. From 2023.0.101-rc until 2025.1.18, 2026.0.25 and 2026.1.19, the Windows Visual Studio integration deserializes local named-pipe messages without restricting which CLR types can be instantiated. The pipe connects `devenv`, the out-of-process Roslyn code-analysis process and the `CodeLens` process, and has the predictable name `Metalama_{role}_{processId}_{hash(PackageVersion)}`. Releases from the first public 2023.0 line through 2026.0.x use Newtonsoft.Json with `TypeNameHandling.All`; the later `SerializationBind","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62848"},{"at":"2026-11-03T16:37:44.000Z","source":"C26","sourceName":"GitHub Advisory Database","role":"Database","severity":3,"title":"GHSA-h26j-4vp7-x9w2 / CVE-2026-62848: Metalama: Unsafe deserialization over Metalama's Visual Studio inter-process named pipe enables local code execution","text":"nuget:Metalama.Framework, nuget:Metalama.Framework, nuget:Metalama.Framework","url":"https://github.com/advisories/GHSA-h26j-4vp7-x9w2"}],"crowd":[],"reference":{"nvd":{"published":"2026-10-30T21:17:13.957","score":7.3,"severity":"HIGH","desc":"Metalama is a Roslyn-based open-source patterns and architecture toolkit for C#. From 2023.0.101-rc until 2025.1.18, 2026.0.25 and 2026.1.19, the Windows Visual Studio integration deserializes local named-pipe messages without restricting which CLR types can be instantiated. The pipe connects `deven","product":"","seen":1793803438877},"kev":null,"epss":{"epss":0.00186,"pct":0.0834,"at":1793803438877},"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}