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CVE-2026-66884— The Erlang Ecosystem Foundation oidcc 跨站请求伪造漏洞

一分钟漏洞结论

影响对象
Erlang Ecosystem Foundation oidcc_plug
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

The Erlang Ecosystem Foundation oidcc是The Erlang Ecosystem Foundation基金会开源的一个Erlang&Elixir中的OpenId Connect客户端库。 The Erlang Ecosystem Foundation oidcc 0.2.0-beta.1版本至0.5.0之前版本存在跨站请求伪造漏洞，该漏洞源于回调请求处理时未正确验证会话，导致nonce、state、PKCE、peer IP和user agent检查被跳过，可能允许攻击者

CVSS 2.1 · Low EPSS 0.26% · P17

影响版本矩阵 2

厂商产品 版本范围状态
Erlang Ecosystem Foundation oidcc_plug 0.2.0-beta.1< 0.5.0 affected
e577ae73b9080693442916043a22d8f05491dd93< 97d75afc57826dca31989b47d6e2a3c136039917 affected
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一、 漏洞 CVE-2026-66884 基础信息

漏洞信息
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Vulnerability Title
Oidcc.Plug.AuthorizationCallback accepts callbacks with no authorize session or no state parameter, defeating CSRF protection
来源: CVE Program / CVE List V5
Vulnerability Description
Cross-Site Request Forgery vulnerability in Erlang Ecosystem Foundation oidcc_plug (Oidcc.Plug.AuthorizationCallback module) allows an attacker to make a victim's browser complete an authorization flow the victim never initiated. This vulnerability is associated with program file lib/oidcc/plug/authorization_callback.ex and program routine Oidcc.Plug.AuthorizationCallback.call/2. A callback request that carries no Oidcc.Plug.Authorize session is processed with every security check disabled rather than being rejected. call/2 substitutes permissive defaults for the absent session, and each downstream check treats its value as nothing to compare and returns :ok, so the nonce, state, PKCE, peer IP and user agent checks are all skipped. A separate clause of check_state/2 also accepts a state-less request when a verifier is present. An attacker obtains an authorization code for their own provider account, then induces the victim to visit the callback endpoint with that code and no state parameter. The application signs the victim in as the attacker, so the victim's subsequent actions occur in the attacker's account where the attacker can read them. Applications reusing one callback for both signing in and linking a provider account are further exposed to account takeover, the attacker's account becoming linked to the victim's. The permissive fallback serves no conforming flow. Third-party-initiated login reaches a relying party at a separate login initiation endpoint and causes it to send a fresh authentication request, and this library implements no such endpoint. Oidcc.Plug.Authorize always sends a state parameter, which an authorization server must echo, so no legitimate callback lacks one. This issue affects oidcc_plug: from 0.2.0-beta.1 before 0.5.0.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
来源: CVE Program / CVE List V5
Vulnerability Title
The Erlang Ecosystem Foundation oidcc 跨站请求伪造漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
The Erlang Ecosystem Foundation oidcc是The Erlang Ecosystem Foundation基金会开源的一个Erlang&Elixir中的OpenId Connect客户端库。 The Erlang Ecosystem Foundation oidcc 0.2.0-beta.1版本至0.5.0之前版本存在跨站请求伪造漏洞，该漏洞源于回调请求处理时未正确验证会话，导致nonce、state、PKCE、peer IP和user agent检查被跳过，可能允许攻击者
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD

受影响产品

厂商 产品 影响版本 CPE 订阅
Erlang Ecosystem Foundation oidcc_plug 0.2.0-beta.1 ~ 0.5.0 cpe:2.3:a:erlef:oidcc_plug:*:*:*:*:*:erlang:*:*
Erlang Ecosystem Foundation oidcc_plug e577ae73b9080693442916043a22d8f05491dd93 ~ 97d75afc57826dca31989b47d6e2a3c136039917 cpe:2.3:a:erlef:oidcc_plug:*:*:*:*:*:erlang:*:*

二、漏洞 CVE-2026-66884 的公开POC

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三、漏洞 CVE-2026-66884 的情报信息

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CVE-2026-66884 补丁与修复 (1)

CVE-2026-66884 厂商安全公告 (2)

CVE-2026-66884 其他参考 (1)

IV. Related Vulnerabilities

Same product: oidcc_plug
Same vendor: Erlang Ecosystem Foundation
Same weakness: CWE-352