CVE-2026-86115

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.

References

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

https://github.com/simstudioai/sim/pull/7179

https://github.com/simstudioai/sim/blob/v0.8.13/apps/sim/tools/index.ts

https://github.com/simstudioai/sim/blob/v0.8.13/apps/sim/lib/auth/hybrid.ts

https://github.com/simstudioai/sim

https://github.com/geo-chen/oss/blob/main/sim.md

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

CVSS v4