CVE-2026-56422Network attack vector

Authenticated object overwrite via client-controlled identifiers

Published Jun 22, 2026 · Updated Jun 22, 2026

Mass assignment in MISP 2.5.41 and earlier allows remote authenticated users to overwrite or reassign stored objects via crafted requests. CRUDComponent::edit() copied payload fields, including id, onto an authorized loaded record, so CakePHP save() treated the supplied key as another row's update target. Access to one editable object is required, but forged ownership and scope keys can redirect writes, transfer ownership, or expose stored content across user or organization boundaries.

CVSS severity9.4
Critical
EPSS probability0.60%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Mass assignment in MISP 2.5.41 and earlier allows remote authenticated users to overwrite or reassign stored objects via crafted requests. CRUDComponent::edit() copied payload fields, including id, onto an authorized loaded record, so CakePHP save() treated the supplied key as another row's update target. Access to one editable object is required, but forged ownership and scope keys can redirect writes, transfer ownership, or expose stored content across user or organization boundaries.

The record

CVE
CVE-2026-56422
Published
Jun 22, 2026
Updated
Jun 22, 2026
Vendor
MISP Project
Product
MISP
Classifications
CWE-639, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 22, 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 <=2.5.41

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MISP Project · MISPversion=0 <=2.5.41

Published CVSS scores

9.4CIRCLCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1565.001Data Manipulation: Stored 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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