{"id":"CVE-2026-103655","published":"2026-10-01T09:17:07.867","lastModified":"2026-10-01T16:17:37.487","description":"MISP contains a vulnerability in its two-factor authentication (TOTP) verification process that permits a valid one-time code to be accepted more than once within its time-based validity window.\n\nThe issue exists in the user login flow where a TOTP code is verified as a second authentication factor. Because the system did not record whether a given TOTP period had already been consumed, the same code remained valid for its entire time window (typically 30 seconds). An attacker who captures a legitimate code during a user's login could replay it to authenticate a second session as that user.\n\nPreconditions:\n\n- The target user has TOTP-based two-factor authentication enabled.\n\n- The attacker is in a position to observe or intercept the TOTP code during a legitimate login (e.g., network-level interception, shoulder surfing, or a compromised client).\n\n- The replay must occur within the TOTP validity period.\n\nSecurity impact:\n\n- Unauthorized account access by replaying a captured one-time code.\n\n- Potential compromise of threat-intelligence data and administrative functions accessible to the targeted user.\n\nAffected versions: <v2.5.48.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-294"],"vendors":[],"products":[],"references":[{"url":"https://github.com/MISP/MISP/commit/a020fa47b","tags":[]}],"exploitRefs":[{"url":"https://github.com/MISP/MISP/commit/a020fa47b","tags":[]}],"hasPoc":true,"ai":null}