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.
The 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.
Preconditions:
- The target user has TOTP-based two-factor authentication enabled.
- 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).
- The replay must occur within the TOTP validity period.
Security impact:
- Unauthorized account access by replaying a captured one-time code.
- Potential compromise of threat-intelligence data and administrative functions accessible to the targeted user.
Affected versions: <v2.5.48.
CVSS
No CVSS.
References
| Link | Resource |
|---|---|
| https://github.com/MISP/MISP/commit/a020fa47b |
Configurations
No configuration.
History
01 Oct 2026, 09:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-10-01 09:17
Updated : 2026-10-01 16:17
NVD link : CVE-2026-103655
Mitre link : CVE-2026-103655
CVE.ORG link : CVE-2026-103655
JSON object : View
Products Affected
No product.
CWE
CWE-294
Authentication Bypass by Capture-replay