CVE-2026-65635
Boruta dynamic client registration allows creation of over-privileged OAuth clients
Description
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.
INFO
Published Date :
July 30, 2026, 3:16 p.m.
Last Modified :
July 30, 2026, 5 p.m.
Remotely Exploit :
Yes !
Source :
6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Affected Products
The following products are affected by CVE-2026-65635
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | 6b3ad84c-e1a6-4bf7-a703-f496b71e49db | ||||
| CVSS 4.0 | HIGH | 6b3ad84c-e1a6-4bf7-a703-f496b71e49db |
Solution
- Update Elixir.Boruta.Openid to version 2.3.7 or later.
- Implement a field-level allowlist for registration parameters.
- Validate all caller-supplied registration parameters.
- Enforce operator approval for administrative controls.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-65635.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-65635 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-65635
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-65635 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-65635 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Jul. 30, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:a:malach-it:boruta:*:*:*:*:*:*:*:*'], 'repo': 'https://github.com/malach-it/boruta_auth', 'vendor': 'malach-it', 'modules': ['Elixir.Boruta.Openid'], 'product': 'boruta', 'versions': [{'status': 'affected', 'version': '2.3.0', 'lessThan': '2.3.7', 'versionType': 'semver'}], 'packageURL': 'pkg:hex/boruta', 'packageName': 'boruta', 'programFiles': ['lib/boruta/openid.ex'], 'collectionURL': 'https://repo.hex.pm', 'defaultStatus': 'unaffected', 'programRoutines': [{'name': "'Elixir.Boruta.Openid':register_client/3"}, {'name': "'Elixir.Boruta.Openid':parse_registration_params/2"}]}, {'cpes': ['cpe:2.3:a:malach-it:boruta:*:*:*:*:*:*:*:*'], 'repo': 'https://github.com/malach-it/boruta_auth', 'vendor': 'malach-it', 'modules': ['Elixir.Boruta.Openid'], 'product': 'boruta', 'versions': [{'status': 'affected', 'changes': [{'at': '82584c854a332482232fd25301ab12a835f9f643', 'status': 'unaffected'}, {'at': '95619a1beaff68fa766cca9b388e7c780d182525', 'status': 'unaffected'}], 'version': '85481b706636fe68a43d0b8d3275e2afc7f7fee1', 'lessThan': '*', 'versionType': 'git'}], 'packageURL': 'pkg:github/malach-it/boruta_auth', 'packageName': 'malach-it/boruta_auth', 'programFiles': ['lib/boruta/openid.ex'], 'collectionURL': 'https://github.com', 'defaultStatus': 'unaffected', 'programRoutines': [{'name': "'Elixir.Boruta.Openid':register_client/3"}, {'name': "'Elixir.Boruta.Openid':parse_registration_params/2"}]}] Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:L/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-653 Added Reference https://cna.erlef.org/cves/CVE-2026-65635.html Added Reference https://github.com/malach-it/boruta_auth/commit/82584c854a332482232fd25301ab12a835f9f643 Added Reference https://github.com/malach-it/boruta_auth/commit/95619a1beaff68fa766cca9b388e7c780d182525 Added Reference https://github.com/malach-it/boruta_auth/security/advisories/GHSA-w869-fcf2-68vp Added Reference https://osv.dev/vulnerability/EEF-CVE-2026-65635