{"id":"CVE-2026-107276","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-107276","generatedAt":"2026-10-28T01:03:07.929Z","title":"MISP contains a race condition in the email-based one-time password (OTP) login flow.","description":"MISP contains a race condition in the email-based one-time password (OTP) login flow. When two HTTP requests carrying the same valid OTP are submitted concurrently, both can successfully authenticate and establish a session. The root cause is that the OTP value is read from the shared store, validated, and then deleted in separate non-atomic steps, allowing a second in-flight request to read the same value before the first request's deletion takes effect.\n\nPreconditions:\n\n- The target MISP instance has email OTP login enabled.\n\n- The attacker possesses a valid, unexpired OTP (e.g., via email interception or social engineering).\n\n- The attacker can issue two HTTP POST requests in close temporal proximity.\n\nImpact:\n\n- The one-time-use guarantee of the OTP is violated; a single code can yield two authenticated sessions.\n\n- This weakens the authentication control and may facilitate unauthorized access if the OTP is shared or intercepted.\n\nAffected versions: <2.5.48","published":"2026-10-07T16:17:47.000Z","lastModified":"2026-10-07T21:17:15.000Z","status":"Deferred","sourceIdentifier":"5a6e4751-2f3f-4070-9419-94fb35b644e8","cvss":{"version":"4.0","score":6.3,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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-362","CWE-367"],"affected":[],"epss":{"score":0.00213,"percentile":0.11491,"date":"2026-10-26","history":[{"date":"2026-10-08","score":0.00213,"percentile":0.10634}]},"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 (0.21%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-07T16:17:47.000Z","detail":{"score":"6.3","severity":"MEDIUM","publishedAt":"2026-10-07T16:17:47.213Z"},"summary":"New CVE, medium severity (CVSS 6.3)."}],"references":[{"url":"https://github.com/MISP/MISP/commit/ba95e67d5","source":"5a6e4751-2f3f-4070-9419-94fb35b644e8"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-107276","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."}