CVE-2026-44379Network attack vector

Collection integrity corruption via unvalidated UUIDs

Published May 13, 2026 · Updated May 13, 2026

Improper input validation in MISP before 2.5.37 allows remote authenticated users to store malformed Collection UUIDs via record writes. The Collection model lacked a uuid validation rule, so create and edit paths accepted values that did not conform to RFC 4122. Collection-create or modify permission is required; malformed identifiers can undermine record integrity and disrupt code that assumes valid UUIDs.

CVSS severity5.3
Medium
EPSS probability0.18%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in MISP before 2.5.37 allows remote authenticated users to store malformed Collection UUIDs via record writes. The Collection model lacked a uuid validation rule, so create and edit paths accepted values that did not conform to RFC 4122. Collection-create or modify permission is required; malformed identifiers can undermine record integrity and disrupt code that assumes valid UUIDs.

The record

CVE
CVE-2026-44379
Published
May 13, 2026
Updated
May 13, 2026
Vendor
MISP Project
Product
MISP
Classifications
CWE-20, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.5.37

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MISP Project · MISPversion=< 2.5.37

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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