{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-44332","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-05-05T19:52:59.146Z","datePublished":"2026-07-08T19:32:15.113Z","dateUpdated":"2026-07-09T14:33:29.004Z"},"containers":{"cna":{"title":"Fiber: Username Enumeration via Timing Oracle in BasicAuth Default Authorizer","problemTypes":[{"descriptions":[{"cweId":"CWE-203","lang":"en","description":"CWE-203: Observable Discrepancy","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8"},{"name":"https://github.com/gofiber/fiber/pull/4245","tags":["x_refsource_MISC"],"url":"https://github.com/gofiber/fiber/pull/4245"},{"name":"https://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059e","tags":["x_refsource_MISC"],"url":"https://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059e"},{"name":"https://github.com/gofiber/fiber/releases/tag/v3.3.0","tags":["x_refsource_MISC"],"url":"https://github.com/gofiber/fiber/releases/tag/v3.3.0"}],"affected":[{"vendor":"gofiber","product":"fiber","versions":[{"version":"< 3.3.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-08T19:32:15.113Z"},"descriptions":[{"lang":"en","value":"Fiber is an Express inspired web framework written in Go. Prior to 3.3.0, the default Authorizer function in the BasicAuth middleware in middleware/basicauth/config.go uses short-circuit evaluation that skips password hash comparison for non-existent usernames, enabling reliable remote username enumeration through response timing differences. This issue is fixed in version 3.3.0."}],"source":{"advisory":"GHSA-g5vh-55hw-rxm8","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-09T14:33:24.172923Z","id":"CVE-2026-44332","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-09T14:33:29.004Z"}}]}}