CVE-2026-107204: critical vulnerability in LMCache
LMCache through 0.5.5 Unauthenticated RCE via /run_script Endpoint
Published
25Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3
exploitation probability
—
observed exploitation
nono source reports it
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
LMCache · LMCacheRelated CVEs — LMCache
In the same product, most dangerous first.
CVE-2026-105192CRITICALLMCache Unauthenticated RCE in multiprocess mode via pickle deserializationEPSS 0.7%CVE-2026-107207MEDIUMLMCache through 0.5.5 Missing Authentication in Frontend Node Catalog Allows SSRF Allowlist BypassEPSS —CVE-2026-107206HIGHLMCache through 0.5.5 Missing Authentication in MP HTTP Server Management APIEPSS —CVE-2026-107205HIGHLMCache through 0.5.5 Missing Authentication in MP Coordinator Fleet Control APIEPSS —
References
https://github.com/LMCache/LMCachehttps://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/internal_api_server/common/run_script_api.py#L54-L76https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/multiprocess/http_apis/common_api.py#L41-L46https://github.com/LMCache/LMCache/issues/5510https://www.vulncheck.com/advisories/lmcache-through-0.5.5-unauthenticated-rce-via-run-script-endpoint