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CVE-2026-86242— Unauthenticated RCE via Custom Plugin HTTP Path on Dynamically Linked Builds

Quick assessment

Affected
maximhq Bifrost
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.

Maxim AI Bifrost AI Gateway是Maxim AI组织开源的一款面向AI服务调用的智能网关。 Maxim AI Bifrost AI Gateway 2.0.0之前版本存在安全漏洞，该漏洞源于管理身份验证默认禁用时，可通过未经身份验证的POST /api/plugins请求接收路径为HTTP URL的已启用自定义插件，共享对象加载器将HTTP前缀路径视为下载URL并加载该插件，可能导致远程代码执行或服务端请求伪造。

CVSS 8.1 · High EPSS 3.57% · P89

Affected Version Matrix 1

VendorProduct Version RangeStatus
maximhq Bifrost < 2.0.0 affected
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I. Basic Information for CVE-2026-86242

Vulnerability Information
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Vulnerability Title
Unauthenticated RCE via Custom Plugin HTTP Path on Dynamically Linked Builds
Source: CVE Program / CVE List V5
Vulnerability Description
Bifrost HTTP transport before 2.0.0 accepts an enabled custom plugin whose path is an HTTP URL through unauthenticated POST /api/plugins when management authentication is disabled (the default, governance.auth_config.is_enabled=false). The shared-object loader treats an http-prefixed path as a download URL, writes the body to a temporary .so, and passes it to Go's plugin.Open. After a successful open, optional Init runs immediately with the supplied config as the Bifrost process user. On documented dynamically linked builds (DYNAMIC=1 / no static-link flags), which the vendor requires for custom Go plugins, plugin.Open is expected to succeed and this is unauthenticated remote code execution. On the published statically linked Docker image, plugin.Open fails with Dynamic loading not supported, so that build class is only server-side request forgery. Attack complexity is High because the attacker cannot force RCE on the default static image and a loadable plugin must match the host Go version, OS, architecture, and linkage. The 1.6.x HTTP transport line through 1.6.11 does not contain the fix.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Maxim AI Bifrost AI Gateway 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Maxim AI Bifrost AI Gateway是Maxim AI组织开源的一款面向AI服务调用的智能网关。 Maxim AI Bifrost AI Gateway 2.0.0之前版本存在安全漏洞，该漏洞源于管理身份验证默认禁用时，可通过未经身份验证的POST /api/plugins请求接收路径为HTTP URL的已启用自定义插件，共享对象加载器将HTTP前缀路径视为下载URL并加载该插件，可能导致远程代码执行或服务端请求伪造。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
maximhq Bifrost 0 ~ 2.0.0 -

II. Public POCs for CVE-2026-86242

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III. Intelligence Information for CVE-2026-86242

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Patches & Fixes for CVE-2026-86242 (2)

Vendor Advisories for CVE-2026-86242 (1)

Proof of Concept for CVE-2026-86242 (1)

IV. Related Vulnerabilities

Same product: Bifrost
Same vendor: maximhq
Same weakness: CWE-94

V. Comments for CVE-2026-86242

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