{"id":"UBUNTU-CVE-2026-44332","details":"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.","modified":"2026-10-17T12:58:20.455541024Z","published":"2026-07-08T20:16:00Z","upstream":["CVE-2026-44332"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-44332"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-44332"},{"type":"REPORT","url":"https://github.com/gofiber/fiber/commit/c7ac00edd19f9669b1aebbec6e229658baaa059e"},{"type":"REPORT","url":"https://github.com/gofiber/fiber/pull/4245"},{"type":"REPORT","url":"https://github.com/gofiber/fiber/releases/tag/v3.3.0"},{"type":"REPORT","url":"https://github.com/gofiber/fiber/security/advisories/GHSA-g5vh-55hw-rxm8"}],"affected":[{"package":{"name":"golang-github-gofiber-fiber","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/golang-github-gofiber-fiber?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.3.0-1","3.4.0-1","3.5.0-1","3.5.0-4"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-gofiber-fiber-dev","binary_version":"3.5.0-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44332.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}