TI-2026-39253 Aliases CVE-2026-54361 GHSA-94hj-x7j9-542x

MISP mass assignment vulnerabilities allow unauthorized modification of ownership and delegation records

MEDIUM 44CWE-639Published 2026-06-12 · Updated 2026-06-15

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: High · Low · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

MISP contained multiple mass assignment vulnerabilities in the handling of collections, tag collections, event delegations, and shadow attributes. Several controller actions accepted user-supplied fields that should have remained server-controlled, including record identifiers and ownership-related fields such as id, org_id, orgc_id, and user_id. An authenticated attacker with access to the affected endpoints could craft requests containing protected fields in order to alter object ownership, redirect an update to another record, overwrite existing event delegation requests, or modify shadow attribute proposals belonging to another organization. This could result in unauthorized modification of MISP objects and, depending on object visibility and sharing configuration, unauthorized access to or transfer of sensitive threat intelligence data. The issue was fixed by explicitly pinning ownership and identity fields to their stored values during edit operations and by removing user-supplied primary keys from create-only save paths. Affected components: * CollectionsController::edit() * EventDelegationsController::delegateEvent() * ShadowAttributesController::edit() * TagCollectionsController::edit()915 * TagCollectionsController::editWithTags() Attack requirements: The attacker must be authenticated and able to reach the affected MISP endpoints. No user interaction is required.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00262 18th percentileScored 2026-11-07

Fix Fixed misp (misp): 2.5.40

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
MISP	misp	before 2.5.40	2.5.40	Patch available	CNA

misp VendorMISP Affected before 2.5.40 Fixed in 2.5.40 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:misp-project:misp::::::::	—	—	Misp-project

cpe:2.3:a:misp-project:misp:*:*:*:*:*:*:*:* Versions — — ·Misp-project

Remediation

Fix · CNA misp (misp) Fixed in 2.5.40

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-06-12
misp 2.5.40
12 records Highest priority Priority MEDIUM 1 MEDIUM, 11 LOW
Other records, highest priority first
- TI-2026-39252 MISP sharing group creation mass assignment allows unauthorized takeover of existing sharing groupsPriority LOW 36
- TI-2026-39251 MISP automation endpoints may be exposed to CSRF when Sec-Fetch-Site protection is disabled by defaultPriority LOW 36
- TI-2026-39250 MISP organization administrators can target site administrator accounts for password resetPriority LOW 34
Show all 12 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-54361
2026-10-03 Alias added: GHSA-94hj-x7j9-542x

References

Patch 1

https://github.com/MISP/MISP/commit/9341690e9b6dde7f0605edea5533e05ba7362e35

TI-2025-41517 In MISP before 2.5.28, app/View/Elements/Workflows/executionPath.ctp allows XSS in the workflow execution path. CVSS 3.1CRITICAL 9.0
TI-2026-65744 MISP TOTP Code Replay Allows Duplicate Authentication Within Validity Period CVSS 4.0CRITICAL 9.3
TI-2026-54145 Path Traversal in MISP Object Template Resolution During STIX Import and Export in misp-stix library CVSS 4.0HIGH 8.8
TI-2020-10250 MISP MISP-maltego 1.4.4 incorrectly shares a MISP connection across users in a remote-transform use case. CVSS 3.1CRITICAL 9.8
TI-2026-59159 MISP Unauthenticated Mail Endpoints Allow Unbounded Storage Consumption and Request Flooding CVSS 4.0HIGH 8.7
TI-2026-58541 MISP LDAP and LinOTP Authentication Bypass via Empty or Invalid Credentials CVSS 4.0CRITICAL 9.5

See all 182 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences