Medium severity · published May 13, 2026
CVE-2026-44379
MISP: Improper UUID validation in MISP Collections
5.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MI
MISP · MISP
< 2.5.37 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44379
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-44379
Patch
https://github.com/MISP/MISP/commit/f8b20358c3cd8fd3d784452901876f2db0acbf05
Third Party Advisory
https://github.com/MISP/MISP/security/advisories/GHSA-jrvj-84mg-8f29
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