CVE-2026-65635: CWE-653 Improper Isolation or Compartmentalization in malach-it boruta
CVE-2026-65635 is a high-severity vulnerability in the malach-it boruta library (Elixir.Boruta.Openid module) that allows unauthenticated attackers to register OpenID Connect clients with administrative privileges. This occurs because the dynamic client registration endpoint does not properly isolate administrative controls from public client metadata, enabling attackers to set sensitive attributes such as grant types, scopes, token lifetimes, and signing settings. The issue affects boruta versions 2.3.0 up to but not including 2.3.7.
AI Analysis
Technical Summary
The vulnerability arises from improper isolation or compartmentalization in the Boruta.Openid.register_client/3 function, which forwards caller-supplied registration parameters directly to the administrative client creation path without enforcing a field-level allowlist separating public and administrative metadata. As a result, unauthenticated registrants can configure security-sensitive client attributes that should require operator approval. This affects boruta versions from 2.3.0 before 2.3.7 and involves the program files lib/boruta/openid.ex and routines register_client/3 and parse_registration_params/2.
Potential Impact
An attacker can register OpenID Connect clients with administrative privileges without authentication, potentially manipulating grant types, authorized scopes, PKCE enforcement, token lifetimes, and signing settings. This could lead to unauthorized access, privilege escalation, and compromise of the authentication system relying on boruta for OpenID Connect client management.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch is currently documented. Until a patch is available, restrict access to the dynamic client registration endpoint if possible and monitor for unauthorized client registrations. Review and implement strict validation and allowlisting of client registration parameters to separate public and administrative metadata.
CVE-2026-65635: CWE-653 Improper Isolation or Compartmentalization in malach-it boruta
Description
CVE-2026-65635 is a high-severity vulnerability in the malach-it boruta library (Elixir.Boruta.Openid module) that allows unauthenticated attackers to register OpenID Connect clients with administrative privileges. This occurs because the dynamic client registration endpoint does not properly isolate administrative controls from public client metadata, enabling attackers to set sensitive attributes such as grant types, scopes, token lifetimes, and signing settings. The issue affects boruta versions 2.3.0 up to but not including 2.3.7.
CVSS v4.0
Score 8.3high
Affected software
cpe:2.3:a:malach-it:boruta:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability arises from improper isolation or compartmentalization in the Boruta.Openid.register_client/3 function, which forwards caller-supplied registration parameters directly to the administrative client creation path without enforcing a field-level allowlist separating public and administrative metadata. As a result, unauthenticated registrants can configure security-sensitive client attributes that should require operator approval. This affects boruta versions from 2.3.0 before 2.3.7 and involves the program files lib/boruta/openid.ex and routines register_client/3 and parse_registration_params/2.
Potential Impact
An attacker can register OpenID Connect clients with administrative privileges without authentication, potentially manipulating grant types, authorized scopes, PKCE enforcement, token lifetimes, and signing settings. This could lead to unauthorized access, privilege escalation, and compromise of the authentication system relying on boruta for OpenID Connect client management.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch is currently documented. Until a patch is available, restrict access to the dynamic client registration endpoint if possible and monitor for unauthorized client registrations. Review and implement strict validation and allowlisting of client registration parameters to separate public and administrative metadata.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- EEF
- Date Reserved
- 2026-07-22T13:58:26.233Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a6b816b9c2644c7f860ebcb
Added to database: 07/30/2026, 16:52:59 UTC
Last enriched: 07/30/2026, 17:07:24 UTC
Last updated: 07/30/2026, 17:07:24 UTC
Views: 3
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