CVE-2026-107276
- Source
- https://cve.org/CVERecord?id=CVE-2026-107276
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107276.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-107276
- Published
- 2026-10-07T15:36:49Z
- Modified
- 2026-10-08T10:30:31Z
- Severity
-
- 6.3 (Medium) CVSS_V4 - 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 CVSS Calculator
- 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.
Preconditions:
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The target MISP instance has email OTP login enabled.
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The attacker possesses a valid, unexpired OTP (e.g., via email interception or social engineering).
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The attacker can issue two HTTP POST requests in close temporal proximity.
Impact:
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The one-time-use guarantee of the OTP is violated; a single code can yield two authenticated sessions.
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This weakens the authentication control and may facilitate unauthorized access if the OTP is shared or intercepted.
Affected versions: <2.5.48
-
- Database specific
{ "cna_assigner": "CIRCL", "cwe_ids": [ "CWE-362", "CWE-367" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107276.json" }- References