{"id":"CVE-2026-94379","summary":"MISP: HTTP Method Bypass of Login Security Controls (Bruteforce Protection and Email OTP)","details":"The login() function in MISP's UsersController.php contained insufficient HTTP method validation for several security-critical code paths. The original code used an allowlist approach, checking only for specific HTTP methods (POST and PUT) before enforcing bruteforce protection, email one-time-password (OTP) verification, and login-failure logging. Because the checks were not exhaustive, an unauthenticated attacker could issue login requests using other HTTP methods and bypass all three security controls simultaneously. Specifically: \n\n - the bruteforce blocklisting check and attempt counter were skipped, allowing unlimited credential-guessing attempts without being rate-limited or blocked\n -  the email OTP two-factor authentication step was skipped, defeating the second factor of authentication\n - login-failure events were neither logged nor counted, removing the audit trail and the mechanism that would normally trigger a blocklist entry.\n\n\n\n\nThe security impact is the effective disabling of brute-force protection and multi-factor authentication for any attacker who can craft an HTTP request with a non-POST/PUT method to the login endpoint, potentially leading to credential compromise and unauthorized access to the MISP instance.\n\n\n\n\n\nVersion affected: \u003c2.5.47","modified":"2026-09-23T03:47:29.696385114Z","published":"2026-09-21T12:35:26.533Z","database_specific":{"cna_assigner":"CIRCL","cwe_ids":["CWE-20","CWE-285"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94379.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/94xxx/CVE-2026-94379.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-94379"},{"type":"FIX","url":"https://github.com/MISP/MISP/commit/ef4dc19c6"},{"type":"PACKAGE","url":"https://github.com/MISP/MISP"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/misp/misp","events":[{"introduced":"0"},{"fixed":"ef4dc19c6"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.5.47"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-94379.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"}]}