{"id":"EUVD-2026-42358","enisaUuid":"0fbec7b8-7f8a-3d16-bf13-083bc1276389","description":"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.","datePublished":"Jul 8, 2026, 7:32:15 PM","dateUpdated":"Jul 9, 2026, 2:33:29 PM","baseScore":5.3,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","references":"https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8\nhttps://github.com/gofiber/fiber/pull/4245\nhttps://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059e\nhttps://github.com/gofiber/fiber/releases/tag/v3.3.0\n","aliases":"CVE-2026-44332\nGHSA-g5vh-55hw-rxm8\n","assigner":"GitHub_M","epss":0.52,"enisaIdProduct":[{"id":"94363748-7f01-307d-b929-7c9ef38edb68","product":{"name":"fiber","vendor":{"name":"gofiber"}},"product_version":"\u003c 3.3.0"}],"enisaIdVendor":[{"id":"40e1d623-4a90-3133-bef5-74898004ea4f","vendor":{"name":"gofiber"}}],"enisaIdVulnerability":[{"id":"d377565c-8472-3811-835f-965b266fdf9b","vulnerability":{"id":"GHSA-g5vh-55hw-rxm8","description":"GoFiber Vulnerable to Username Enumeration via Timing Oracle in BasicAuth Default Authorizer","datePublished":"Jul 2, 2026, 1:46:25 PM","dateUpdated":"Jul 2, 2026, 1:46:25 PM","baseScore":0.0,"references":"https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8\nhttps://github.com/gofiber/fiber\n","enisa_id":"EUVD-2026-42358\n","aliases":"GHSA-g5vh-55hw-rxm8\nCVE-2026-44332\n","epss":0.0,"dataProcessed":"Oct 25, 2026, 1:57:47 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}},{"id":"da124116-8c4c-357c-a501-9052849d729d","vulnerability":{"id":"CVE-2026-44332","description":"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.","datePublished":"Jul 8, 2026, 7:32:15 PM","dateUpdated":"Jul 9, 2026, 2:33:29 PM","status":"PUBLISHED","baseScore":5.3,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","references":"https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8\nhttps://github.com/gofiber/fiber/pull/4245\nhttps://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059e\nhttps://github.com/gofiber/fiber/releases/tag/v3.3.0\n","enisa_id":"EUVD-2026-42358\n","assigner":"GitHub_M","epss":0.52,"dataProcessed":"Oct 28, 2026, 7:17:27 AM","vulnerabilityProduct":[{"id":"9a67c397-045d-359b-9d6c-c58d369cf9e2","product":{"name":"fiber","vendor":{"name":"gofiber"}},"product_version":"\u003c 3.3.0"}],"vulnerabilityVendor":[{"id":"57328b55-abb3-3c24-a43b-1712b16b9a73","vendor":{"name":"gofiber"}}]}}],"enisaIdAdvisory":[]}