Unauthenticated privileged client creation via dynamic registration
Published Jul 30, 2026 · Updated Jul 30, 2026
Improper isolation in malach.it Boruta 2.3.0 through 2.3.6 allows remote attackers to create over-privileged OAuth clients via dynamic registration. Boruta.Openid.register_client/3 passes the caller's registration map through parse_registration_params/2, which leaves admin-only fields intact for the shared administrative creation path. Exploitation requires a host application to expose this non-default entry point without a trusted initial access token or strict server-side allowlist, enabling unauthorized token issuance, introspection, or revocation within the server's policy.
Summary
What happened
Improper isolation in malach.it Boruta 2.3.0 through 2.3.6 allows remote attackers to create over-privileged OAuth clients via dynamic registration. Boruta.Openid.register_client/3 passes the caller's registration map through parse_registration_params/2, which leaves admin-only fields intact for the shared administrative creation path. Exploitation requires a host application to expose this non-default entry point without a trusted initial access token or strict server-side allowlist, enabling unauthorized token issuance, introspection, or revocation within the server's policy.
The record
- CVE
- CVE-2026-65635
- Published
- Jul 30, 2026
- Updated
- Jul 30, 2026
- Vendor
- malach.it
- Product
- Boruta
- Classifications
- CWE-653, CAPEC-1, T1136
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 30, 2026CVE publishedPublication date reported by the CVE source.
- Jul 30, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.3.0 <2.3.7
- Affected versionversion=85481b706636fe68a43d0b8d3275e2afc7f7fee1 <* changes=[{"at":"82584c854a332482232fd25301ab12a835f9f643","status":"unaffected"},{"at":"95619a1beaff68fa766cca9b388e7c780d182525","status":"unaffected"}]
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Over-privileged dynamic client registration proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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