{"id":"CVE-2026-44332","sourceIdentifier":"security-advisories@github.com","published":"2026-07-08T20:16:49.773","lastModified":"2026-07-15T20:52:13.877","vulnStatus":"Analyzed","cveTags":[],"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"gofiber","product":"fiber","versions":[{"version":"< 3.3.0","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-09T14:33:24.172923Z","id":"CVE-2026-44332","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-203"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:gofiber:fiber:*:*:*:*:*:go:*:*","versionEndExcluding":"3.3.0","matchCriteriaId":"91FCF443-EDF5-49A3-B84E-764942F2AF27"}]}]}],"references":[{"url":"https://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059e","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/gofiber/fiber/pull/4245","source":"security-advisories@github.com","tags":["Issue Tracking","Patch"]},{"url":"https://github.com/gofiber/fiber/releases/tag/v3.3.0","source":"security-advisories@github.com","tags":["Release Notes"]},{"url":"https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]}]}