Is CVE-2026-103655 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-103655 being exploited in the wild.

How severe is CVE-2026-103655?

Informational severity, published 1 October 2026.

Is there a fix for CVE-2026-103655?

Yes: fixed in 2.5.48 and later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-103655 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-103655?

Check whether you run Misp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-103655: MISP TOTP verification code reuse vulnerability

CVE-2026-103655 · Severity: info · Published 2026-10-01

MISP is a threat intelligence platform used to share and manage threat data across organizations. The platform's two-factor authentication system has a vulnerability that allows attackers to replay captured one-time codes to gain unauthorized access to user accounts. An attacker who intercepts a legitimate authentication code during someone's login could reuse that same code within its 30-second validity window to compromise that account.

Technologies: Misp. Vendors: Misp.

Quick answers

Is CVE-2026-103655 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-103655 being exploited in the wild.
How severe is CVE-2026-103655?: Informational severity, published 1 October 2026.
Which products and versions are affected?: Misp < 2.5.48.
Is there a fix for CVE-2026-103655?: Yes: fixed in 2.5.48 and later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-103655 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-103655?: Check whether you run Misp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 2.5.48 and later

Technical details

The vulnerability exists in the TOTP verification logic within MISP's user login flow, where the system fails to record whether a given TOTP time period has been consumed. This allows the same valid code to be accepted multiple times within its validity window. An attacker must intercept a legitimate TOTP code (via network interception, shoulder surfing, or compromised client) and replay it within the code's validity period; the attack requires the target user to have TOTP enabled.

Affected products

MISP MISP < 2.5.48

Timeline

2026-10-01: disclosed

References

https://github.com/MISP/MISP/commit/a020fa47b

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.