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TI-2026-46784 Aliases CVE-2026-65635

Boruta dynamic client registration allows creation of over-privileged OAuth clients

Priority HIGH 69CWE-653Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Improper Isolation or Compartmentalization vulnerability in malach-it boruta (Elixir.Boruta.Openid module) allows attackers to register OpenID Connect clients with administrative privileges through the dynamic client registration entry point. Boruta.Openid.register_client/3 forwards caller-supplied registration parameters to the administrative client creation path without a public/admin field-level allowlist, so an unauthenticated registrant can set security-sensitive attributes including supported grant types, authorized scopes, PKCE enforcement, public refresh and revocation behavior, token lifetimes, and signing settings. The library does not distinguish between metadata a public registrant is allowed to set and administrative controls that should require operator approval. This vulnerability is associated with program files lib/boruta/openid.ex and program routines 'Elixir.Boruta.Openid':register_client/3, 'Elixir.Boruta.Openid':parse_registration_params/2. This issue affects boruta from 2.3.0 before 2.3.7.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00382 32nd percentileScored 2026-11-07
Fix Fixed boruta (malach-it): 2.3.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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

VendorProductAffected versionsFixed inStatusSource
malach-itboruta2.3.0 to before 2.3.72.3.7Patch availableCNA
  • boruta Vendormalach-it Affected 2.3.0 to before 2.3.7 Fixed in 2.3.7 Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:malach-it:boruta:*:*:*:*:*:*:*:*———
  • cpe:2.3:a:malach-it:boruta:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

  • Fix · CNA boruta (malach-it) Fixed in 2.3.7

Fixed in the same release

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

  • Release ·

    malach-it boruta 2.3.7

    3 records Highest priority Priority HIGH 2 HIGH, 1 MEDIUM

    Other records, highest priority first

    • TI-2026-38513 Boruta accepts expired JWT client assertions due to missing exp claim validationPriority HIGH 74
    • TI-2026-39658 Server-side request forgery in Boruta OAuth request_uri and OpenID jwks_uri fetchingPriority MEDIUM 64
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-65635

References

Patch 2

Advisory 1

Other 2

  • TI-2026-38513 Boruta accepts expired JWT client assertions due to missing exp claim validation CVSS 4.0CRITICAL 9.1
  • TI-2026-39658 Server-side request forgery in Boruta OAuth request_uri and OpenID jwks_uri fetching CVSS 4.0MEDIUM 6.9
  • TI-2026-36446 Boruta: Authenticated atom-exhaustion DoS in BorutaIdentityWeb.UserSettingsController.update/2 CVSS 4.0HIGH 7.1
  • TI-2026-38702 boruta-server sent sensitive session cookies without the Secure attribute CVSS 4.0HIGH 8.8
  • TI-2026-39899 Boruta: OAuth credentials exposed in Boruta business logs CVSS 3.1MEDIUM 6.5

Sources

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