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TI-2026-69191 Aliases CVE-2026-107276GHSA-fjjq-85mx-vg3v

Race condition in MISP email OTP login allows one-time password reuse

Priority LOW 27CWE-362Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

MISP versions before 2.5.48 contain 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 authenticate and establish a session, because the OTP is read, validated and deleted in separate non-atomic steps (CWE-362). A remote attacker who already holds a valid OTP, for example through email interception or social engineering, can use it to obtain two authenticated sessions, which weakens the one-time-use guarantee of the code.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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: - The target MISP instance has email OTP login enabled. - The attacker possesses a valid, unexpired OTP (e.g., via email interception or social engineering). - The attacker can issue two HTTP POST requests in close temporal proximity. Impact: - The one-time-use guarantee of the OTP is violated; a single code can yield two authenticated sessions. - This weakens the authentication control and may facilitate unauthorized access if the OTP is shared or intercepted. Affected versions: <2.5.48

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00213 11th percentileScored 2026-11-07
Fix Fixed MISP (MISP): 2.5.48

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MISPMISPbefore 2.5.482.5.48Patch availableCNA
  • MISP VendorMISP Affected before 2.5.48 Fixed in 2.5.48 Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:*——MISP
  • cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:* Versions — — ·MISP

Remediation

Update MISP to version 2.5.48 or later, which fixes the flaw. The sources list no fixed version for MISP other than 2.5.48.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA MISP (MISP) Fixed in 2.5.48

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    MISP 2.5.48

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-69130 Forced TOTP enrolment bypass via non-browser requests in MISPPriority LOW 31
    • TI-2026-69201 MISP sync drops objects and attributes when description is emptyPriority LOW 24
    • TI-2026-69128 MISP correlation engine skips refresh when event sharing changesPriority LOW 23
    Show all 4 records →

Timeline

  1. 2026-10-07 Threatist record created from CVE-2026-107276
  2. 2026-10-07 Alias added: GHSA-fjjq-85mx-vg3v
  3. 2026-10-07 CISA SSVC decision points changed
  4. 2026-10-07 Priority changed: MEDIUM → LOW

References

Patch 1

  • TI-2025-41517 In MISP before 2.5.28, app/View/Elements/Workflows/executionPath.ctp allows XSS in the workflow execution path. CVSS 3.1CRITICAL 9.0
  • TI-2026-65744 MISP TOTP Code Replay Allows Duplicate Authentication Within Validity Period CVSS 4.0CRITICAL 9.3
  • TI-2026-54145 Path Traversal in MISP Object Template Resolution During STIX Import and Export in misp-stix library CVSS 4.0HIGH 8.8
  • TI-2020-10250 MISP MISP-maltego 1.4.4 incorrectly shares a MISP connection across users in a remote-transform use case. CVSS 3.1CRITICAL 9.8
  • TI-2026-59159 MISP Unauthenticated Mail Endpoints Allow Unbounded Storage Consumption and Request Flooding CVSS 4.0HIGH 8.7
  • TI-2026-58541 MISP LDAP and LinOTP Authentication Bypass via Empty or Invalid Credentials CVSS 4.0CRITICAL 9.5
See all 182 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences