{"schema":"threatline.record/2","record":{"id":"CVE-2026-107276","aliases":[],"summary":"MISP Email OTP Race Condition Allows One-Time Password to Be Consumed by Multiple Concurrent Requests","details":"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","categories":["Unclassified"],"product":"MISP","vendor":"MISP","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-107276","source_modified_at":"2026-10-07T20:28:21.466Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"MISP","vendor":"MISP","versions":[{"lessThan":"2.5.48","status":"affected","version":"0","versionType":"semver"}],"defaultStatus":null}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-107276","source_modified_at":"2026-10-07T20:28:21.466Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"MISP","ecosystem":null},"version":"2.5.48","basis":"first unaffected version stated in the CVE record"}],"cvss":6.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00213,"percentile":0.11026,"score_date":"2026-10-23"},"published_at":"2026-10-07T15:36:49.564Z","modified_at":"2026-10-07T20:28:21.466Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-107276","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-07T20:28:21.466Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-107276","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/MISP/MISP/commit/ba95e67d5","tags":["patch"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-07T20:28:10.510425Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-07T20:28:21.466Z","content_hash":"72ec3d4062369a81c4bcdacf6aa92a98979d76cc30d9aaaa5fc1ea1f471ffc1f"}}