{"id":"CVE-2026-77582","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-77582","generatedAt":"2026-10-28T01:19:29.981Z","title":"Prior to 5.1.0, Tinyauth exposes a remotely observable timing difference between authentication attempts for existing and nonexistent local usernames. internal/controller/user_controller.go loginHandler and internal/middleware/context_middleware.go…","description":"Tinyauth is an authentication and authorization server. Prior to 5.1.0, Tinyauth exposes a remotely observable timing difference between authentication attempts for existing and nonexistent local usernames. internal/controller/user_controller.go loginHandler and internal/middleware/context_middleware.go basicAuth return quickly after internal/service/auth_service.go reports a missing user, while an existing user causes bcrypt password verification work. Repeated measurements can therefore disclose valid usernames and support targeted credential attacks. This issue is fixed in version 5.1.0.","published":"2026-09-21T17:18:53.000Z","lastModified":"2026-09-30T17:32:07.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":6.9,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-208"],"affected":[],"epss":{"score":0.00626,"percentile":0.49709,"date":"2026-10-26","history":[{"date":"2026-09-22","score":0.00381,"percentile":0.31951}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.63%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-21T17:18:53.000Z","detail":{"score":"6.9","severity":"MEDIUM","publishedAt":"2026-09-21T17:18:53.110Z"},"summary":"New CVE, medium severity (CVSS 6.9)."}],"references":[{"url":"https://github.com/tinyauthapp/tinyauth/commit/c22925c2fba981875d0a2b09dd3ee41c0ae4c310","source":"security-advisories@github.com"},{"url":"https://github.com/tinyauthapp/tinyauth/pull/1004","source":"security-advisories@github.com"},{"url":"https://github.com/tinyauthapp/tinyauth/releases/tag/v5.1.0","source":"security-advisories@github.com"},{"url":"https://github.com/tinyauthapp/tinyauth/security/advisories/GHSA-456h-ww26-f758","source":"security-advisories@github.com"},{"url":"https://github.com/tinyauthapp/tinyauth/security/advisories/GHSA-456h-ww26-f758","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77582","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}