CVE-2026-86115

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.

CVSS v3 5.0 MEDIUM

5.0^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.1 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/geo-chen/oss/blob/main/sim.md
https://github.com/simstudioai/sim
https://github.com/simstudioai/sim/blob/v0.8.13/apps/sim/lib/auth/hybrid.ts
https://github.com/simstudioai/sim/blob/v0.8.13/apps/sim/tools/index.ts
https://github.com/simstudioai/sim/pull/7179
https://www.vulncheck.com/advisories/sim-before-0.8.14-confused-deputy-in-tool-url-routing-mints-an-internal-token-for-a-user-supplied-api-path

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-05 10:16

Updated : 2026-09-08 19:20

NVD link : CVE-2026-86115

Mitre link : CVE-2026-86115

CVE.ORG link : CVE-2026-86115

JSON object : View

Products Affected

No product.

CWE

CWE-441

Unintended Proxy or Intermediary ('Confused Deputy')

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