{"schema_version":"1.7.3","id":"GO-2026-4335","published":"2026-02-03T20:37:17Z","modified":"2026-02-04T19:07:54Z","aliases":["CVE-2026-23518","GHSA-63m5-974w-448v"],"summary":"Fleet has a JWT signature bypass vulnerability in Azure AD MDM enrollment in github.com/fleetdm/fleet","details":"Fleet has a JWT signature bypass vulnerability in Azure AD MDM enrollment in github.com/fleetdm/fleet","affected":[{"package":{"name":"github.com/fleetdm/fleet/v4","ecosystem":"Go","purl":"pkg:golang/github.com/fleetdm/fleet/v4"},"ranges":[{"type":"SEMVER","events":[{"introduced":"4.75.0"},{"fixed":"4.75.2"},{"introduced":"4.76.0"},{"fixed":"4.76.2"},{"introduced":"4.77.0"},{"fixed":"4.77.1"},{"introduced":"4.78.0"},{"fixed":"4.78.3"}]}],"ecosystem_specific":{"custom_ranges":[{"events":[{"introduced":"0"},{"fixed":"4.43.5-0.20260112202845-e225ef57912c"}],"type":"ECOSYSTEM"}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-4335.json"}}],"references":[{"type":"ADVISORY","url":"https://github.com/fleetdm/fleet/security/advisories/GHSA-63m5-974w-448v"},{"type":"FIX","url":"https://github.com/fleetdm/fleet/commit/e225ef57912c8f4ac8977e24b5ebe1d9fd875257"}],"database_specific":{"review_status":"REVIEWED","url":"https://pkg.go.dev/vuln/GO-2026-4335"}}