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CVE-2026-86115— Sim before 0.8.14 Confused Deputy in Tool URL Routing Mints an Internal Token for a User-Supplied /api/ Path

Quick assessment

Affected
simstudioai sim
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.

simstudioai sim是simstudioai公司开源的一个协作工作空间，用于构建、部署和监控 AI 代理和工作流程。 simstudioai sim 0.8.14之前版本存在服务端请求伪造漏洞，该漏洞源于URL前缀匹配未进行协议规范化，导致SSRF验证被跳过并生成内部身份验证令牌。经过身份验证的工作流作者可通过在HTTP块中提供以 /api/ 开头的路径绕过外部URL验证，访问仅内部端点。

CVSS 5.0 · Medium EPSS 0.30% · P22

Affected Version Matrix 1

VendorProduct Version RangeStatus
simstudioai sim < 0.8.14 affected
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I. Basic Information for CVE-2026-86115

Vulnerability Information
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Vulnerability Title
Sim before 0.8.14 Confused Deputy in Tool URL Routing Mints an Internal Token for a User-Supplied /api/ Path
Source: CVE Program / CVE List V5
Vulnerability Description
Sim before 0.8.14 classifies tool requests as internal based on URL prefix matching without scheme normalization, skipping SSRF validation and minting internal authentication tokens. Authenticated workflow authors can bypass external URL validation by supplying paths starting with /api/ in HTTP blocks to reach internal-only endpoints like POST /api/function/execute.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
未有动机的代理或中间人(混淆代理)
Source: CVE Program / CVE List V5
Vulnerability Title
simstudioai sim 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
simstudioai sim是simstudioai公司开源的一个协作工作空间，用于构建、部署和监控 AI 代理和工作流程。 simstudioai sim 0.8.14之前版本存在服务端请求伪造漏洞，该漏洞源于URL前缀匹配未进行协议规范化，导致SSRF验证被跳过并生成内部身份验证令牌。经过身份验证的工作流作者可通过在HTTP块中提供以 /api/ 开头的路径绕过外部URL验证，访问仅内部端点。
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
simstudioai sim 0 ~ 0.8.14 -

II. Public POCs for CVE-2026-86115

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III. Intelligence Information for CVE-2026-86115

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Patches & Fixes for CVE-2026-86115 (2)

Vendor Advisories for CVE-2026-86115 (1)

Proof of Concept for CVE-2026-86115 (1)

Security Blog Posts for CVE-2026-86115 (1)

IV. Related Vulnerabilities

Same product: sim
Same vendor: simstudioai
Same weakness: CWE-441

V. Comments for CVE-2026-86115

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