OpenAM Authentication Bypass via RADIUS Spoofing

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-46560
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-30 19:18:25 UTC
Updated2026-10-30 19:37:07 UTC
DescriptionOpen Access Management (OpenAM) is an access management solution. Prior to 16.1.1, the `RADIUS` authentication module opens an unconnected datagram socket and trusts the first UDP datagram received on the client source port. The receive path does not verify the source IP and port, match the response identifier to the outstanding request, or verify the RFC 2865 `Response Authenticator`; the RFC 2869 `Message-Authenticator` is neither sent nor required. Any non-Reject/non-Challenge packet is treated as success. On a deployment with a `RADIUS` module instance enabled on a login chain, an unauthenticated network attacker can race the real server on-path or spray forged `Access-Accept` packets off-path and obtain a session for any `RADIUS`-mapped username without knowing the shared secret. Unlike CVE-2024-3596, exploitation requires no MD5 chosen-prefix forgery because no response authenticator is checked. The resulting session carries the impersonated principal's privileges. This issue is fixed in version 16.1.1.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001860000 probability, percentile 0.081710000 (date 2026-10-31)

Problem Types: CWE-347 | CWE-347 CWE-347: Improper Verification of Cryptographic Signature

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OpenIdentityPlatform OpenAM affected < 16.1.1 Not specified

References

ReferenceSourceLinkTags
github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-386j-6m8... [email protected] github.com
github.com/OpenIdentityPlatform/OpenAM/commit/5a0c10eccd1d45aaeb5575bbe7... [email protected] github.com
github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.1 [email protected] github.com
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