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CVE-2026-46560— OpenAM Authentication Bypass via RADIUS Spoofing

Quick assessment

Affected
OpenIdentityPlatform OpenAM
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open Access Management（OpenAM）是一款访问管理解决方案。在 16.1.1 版本之前，其 认证模块会打开一个未连接的 datagram 套接字，并信任在客户端源端口上接收到的第一个 UDP 数据报。该接收路径未验证源 IP 地址和端口，未将响应标识符与待处理的请求进行匹配，也未验证 RFC 2865 中定义的 （响应认证器）；同时，RFC 2869 中定义的 （消息认证器）既未发送，也未被要求。任何非拒绝（Reject）且非挑战（Challenge）的数据包均被视为认证成功。 在登录链中启

CVSS 7.5 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
OpenIdentityPlatform OpenAM < 16.1.1 affected
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I. Basic Information for CVE-2026-46560

Vulnerability Information
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Vulnerability Title
OpenAM Authentication Bypass via RADIUS Spoofing
Source: CVE Program / CVE List V5
Vulnerability Description
Open 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenIdentityPlatform OpenAM < 16.1.1 -

II. Public POCs for CVE-2026-46560

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III. Intelligence Information for CVE-2026-46560

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Patches & Fixes for CVE-2026-46560 (1)

Vendor Advisories for CVE-2026-46560 (1)

Vendor Pages for CVE-2026-46560 (1)

IV. Related Vulnerabilities

Same product: OpenAM
Same vendor: OpenIdentityPlatform
Same weakness: CWE-347