CVEvulnerability
CVE-2026-86115
5.3 MEDIUM
Official page ↗
- Status
- Deferred
- Published
- 2026-09-05
- Last modified
- 2026-09-23
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 5.3 MEDIUM — CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 5.0 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
- Weaknesses
- CWE-441
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.
Related
Weakness · CWE (1)
- CWE-441 Unintended Proxy or Intermediary weakness
References
- https://github.com/geo-chen/oss/blob/main/sim.md github.com
- https://github.com/simstudioai/sim github.com
- https://github.com/simstudioai/sim/blob/v0.8.13/apps/sim/lib/auth/hybrid.ts github.com
- https://github.com/simstudioai/sim/blob/v0.8.13/apps/sim/tools/index.ts github.com
- https://github.com/simstudioai/sim/pull/7179 github.com
- 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 www.vulncheck.com