CVE-2026-107204
LMCache through 0.5.5 contains an unauthenticated remote code execution vulnerability that allows…
- Risk score
- 85/100
- CVSS
- 9.8 v3.1
- Exploit chance (30 days)
- 0.8%
- Published
- 7 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 o…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
Why it is Red
- CVSS 9.8 critical
- Remotely exploitable without logging in
- On your watchlist: python
References
- https://github.com/LMCache/LMCache
- https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/internal_api_server/common/run_script_api.py#L54-L76
- https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/multiprocess/http_apis/common_api.py#L41-L46
- https://github.com/LMCache/LMCache/issues/5510
- https://www.vulncheck.com/advisories/lmcache-through-0.5.5-unauthenticated-rce-via-run-script-endpoint
- https://github.com/LMCache/LMCache/issues/5510
Original 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.
Last activity 7 Oct 2026. Patch Forecast updates every hour.