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  4. CVE 2026 104908 misp decaying model import mass assignment allows
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High · CVSS 7.1CVE-2026-104908

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

Answer in brief

CVE-2026-104908 records a High severity (CVSS 7.1) vulnerability in MISP Decaying Model Import Mass Assignment Allows Cross-Organization Model Overwrite and Default Flagging. The current sources do not mark it as known exploited. The current feed maps MISP/MISP (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 2, 2026Updated Oct 2, 2026Source checked Oct 2, 2026First seen by HOL Oct 2, 2026Material review Oct 2, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps MISP/MISP (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
MISP/MISPgeneric>=0 <2.5.482.5.48

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for MISP/MISP.
  2. 2Review the reported fix. Source-reported solution: The import handler now builds the model record from an explicit allow-list of permitted fields (name, parameters, description, ref, formula, version, enabled, all_orgs) using array_intersect_key, discarding any unlisted keys including nested model objects. The organisation identifier and default flag are set unconditionally after filtering. The save operation is preceded by an explicit create() call and the data is wrapped in the proper model key, preventing the ORM from interpreting attacker-supplied nested keys as separate model attributes.

Evidence timeline and material changes

  1. Published upstream

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 2, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • MISP Stored XSS via Unescaped Count Field Value in Remote Event Preview IndexSame misp/misp package
  • MISP ID Translator: Unescaped Remote Event ID Enables Cross-Site Scripting via Linked ServerSame misp/misp package
  • MISP TAXII Object Viewer Stored XSS via Unescaped JSON OutputSame misp/misp package
  • MISP: JavaScript Injection via Remote Tag ID in Event Preview Inline HandlerSame misp/misp package
  • MISP Information Disclosure via Related Events Listing Bypassing Per-Event AuthorizationSame misp/misp package
  • MISP Correlation Authorization Bypass Exposes Restricted Event and Attribute DataSame misp/misp package

Record context

Vulnerability class
Privilege Escalation
EPSS
Not reported
CWE IDs
CWE-915, CWE-285
Source
CVE List V5
Source checked
Oct 2, 2026
References
1 linked source
Open source record