CVE-2026-85533Network attack vectorHinoki check available

Cross-group data placement via conditional authorization check

Published Sep 4, 2026 · Updated Sep 4, 2026

Missing authorization in MISP 2.5.45 and earlier allows remote authenticated users to place data into unauthorized Sharing Groups. Attribute and Galaxy Cluster controllers checked sharing_group_id only when distribution equaled 4, so crafted requests could skip the authorization path. Access to object creation or editing was required, and successful exploitation could cross intended information-sharing boundaries.

CVSS severity7.6
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in MISP 2.5.45 and earlier allows remote authenticated users to place data into unauthorized Sharing Groups. Attribute and Galaxy Cluster controllers checked sharing_group_id only when distribution equaled 4, so crafted requests could skip the authorization path. Access to object creation or editing was required, and successful exploitation could cross intended information-sharing boundaries.

The record

CVE
CVE-2026-85533
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
MISP Project
Product
MISP
Classifications
CWE-862, CAPEC-1
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=0 <=2.5.45

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MISP Project · MISPversion=0 <=2.5.45

Published CVSS scores

7.6CIRCLCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
CAPEC-1Accessing Functionality Not Properly Constrained by ACLs

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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