CVE-2026-107204

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 v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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

Configurations

No configuration.

History

07 Oct 2026, 17:16

Type	Values Removed	Values Added
References	~~() https://github.com/LMCache/LMCache/issues/5510 -~~	() https://github.com/LMCache/LMCache/issues/5510 -

07 Oct 2026, 16:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-07 16:17

Updated : 2026-10-08 21:07

NVD link : CVE-2026-107204

Mitre link : CVE-2026-107204

CVE.ORG link : CVE-2026-107204

JSON object : View

Products Affected

No product.

CWE

CWE-306

Missing Authentication for Critical Function

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