CVE-2026-44379: MISP: Improper UUID validation in MISP Collections

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-13 · updated 2026-06-22
Weakness: CWE-20

Description

MISP is an open source threat intelligence and sharing platform. Prior to 2.5.37, MISP Collections did not enforce RFC 4122 UUID validation on the uuid field. As a result, a user able to create or modify Collection records could submit malformed UUID values, potentially causing integrity issues or unexpected behaviour in code paths that assume Collection UUIDs are valid identifiers. This vulnerability is fixed in 2.5.37.

Affected products

MISP: before 2.5.37 — fixed in 2.5.37

How to fix

Upgrade to a fixed version: MISP 2.5.37. Check the vendor advisory for mitigations.

References

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