CVE-2026-85236Network attack vectorHinoki check available

Event deletion via CSRF-exempt GET request

Published Sep 3, 2026 · Updated Sep 3, 2026

Cross-site request forgery in MISP 2.5.45 and earlier allows remote attackers to delete published empty events through a crafted GET request. The cullEmptyEvents action accepts a state-changing bodyless GET request, bypassing CakePHP CSRF validation, and deletes records with skipBlocklist enabled. Exploitation requires an authenticated MISP user's browser and sufficient privileges, and removed events leave no blocklist entry to prevent or trace later synchronization.

CVSS severity8.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Cross-site request forgery in MISP 2.5.45 and earlier allows remote attackers to delete published empty events through a crafted GET request. The cullEmptyEvents action accepts a state-changing bodyless GET request, bypassing CakePHP CSRF validation, and deletes records with skipBlocklist enabled. Exploitation requires an authenticated MISP user's browser and sufficient privileges, and removed events leave no blocklist entry to prevent or trace later synchronization.

The record

CVE
CVE-2026-85236
Published
Sep 3, 2026
Updated
Sep 3, 2026
Vendor
MISP Project
Product
MISP
Classifications
CWE-352, CAPEC-62
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 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 privilegesunauthenticated

What is affected?

MISP Project · MISPversion=0 <=2.5.45

Published CVSS scores

8.8CIRCLCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
CAPEC-62Cross Site Request Forgery

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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