TI-2026-66150 Aliases CVE-2026-104908 GHSA-h9vw-jjgr-29wc

MISP Decaying Model Import Mass Assignment Allows Cross-Organization Model Overwrite and Default Flagging

LOW 31CWE-285Published 2026-10-02 · Updated 2026-10-02

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-285 and CWE-915.

Summary

MISP contains an improper input validation vulnerability in the decaying model import functionality. The import endpoint was intended to create a new decaying model belonging exclusively to the importing user's organisation, with the default flag forced to off. However, the application stripped only the top-level id and uuid fields and pinned org_id and default on the outer array before saving the data flat. A user with decaying-model permissions could supply a nested model key carrying its own primary key, organisation identifier, and default flag, which bypassed those guards during the save operation. Impact: - A user with perm_decaying could overwrite an existing decaying model belonging to another organisation in place, altering its name, formula, parameters, or ownership. - A user could create or modify a model flagged as the organisation default, affecting scoring behaviour for other users. - A user could reassign a model's organisation to an arbitrary value. Preconditions: - Authenticated user with decaying-model permission (perm_decaying). - Network access to the MISP instance. Affected: <2.5.48.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00287 21st percentileScored 2026-11-07

Fix Fixed MISP (MISP): 2.5.48

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
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 2.5.48	2.5.48	Patch available	CNA

MISP VendorMISP Affected before 2.5.48 Fixed in 2.5.48 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:misp:misp::::::::	—	—	MISP

cpe:2.3:a:misp:misp:*:*:*:*:*:*:*:* Versions — — ·MISP

Remediation

Fix · CNA MISP (MISP) Fixed in 2.5.48

Fixed in the same release

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

Release · 2026-10-02
MISP 2.5.48
8 records Highest priority Priority LOW 8 LOW
Other records, highest priority first
- TI-2026-66152 MISP Correlation Authorization Bypass Exposes Restricted Event and Attribute DataPriority LOW 31
- TI-2026-66148 MISP TAXII Object Viewer Stored XSS via Unescaped JSON OutputPriority LOW 28
- TI-2026-66151 MISP Information Disclosure via Related Events Listing Bypassing Per-Event AuthorizationPriority LOW 24
Show all 8 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-104908
2026-10-03 Alias added: GHSA-h9vw-jjgr-29wc

References

Patch 1

Security patch

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

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