CVE-2026-107204
CRITICAL
CVSS 9.8
Published: 2026-10-07
Modified: 2026-10-08
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Description
LMCache through 0.5.5 contains an unauthenticated remote code execution vulnerability that allows remote attackers to execute Python code by posting scripts to the /run_script endpoint. Attackers can recover real builtins through the injected FastAPI app object, bypassing the guarded __import__, to import os and run operating system commands as the LMCache process.
Quick Facts
| CVE ID | CVE-2026-107204 |
| CVSS Score | 9.8 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Published | 2026-10-07 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |
References
- https://github.com/LMCache/LMCache
- https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/in…
- https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/mu…
- https://github.com/LMCache/LMCache/issues/5510
- https://www.vulncheck.com/advisories/lmcache-through-0.5.5-u…
- https://github.com/LMCache/LMCache/issues/5510