CVE-2026-10813
LowCVSS 3.6Exploitation Probability (EPSS)
Low risk0th percentile - higher than 0% of all known CVEs
Summary
LMCache up to 0.5.4 contains a vulnerability in the hex_hash_to_int16 function in lmcache/integration/vllm/utils.py, involving the use of a weak hash. The attack requires local access and high complexity, and the exploit has been published. A fix is available in version 0.5.5.
Risk Assessment
A local attacker can exploit the weak hash to manipulate data, potentially compromising integrity.
Recommendation
Update LMCache to version 0.5.5 or later, which includes the fix ce08eea76ce5898200efee55f4932fd07a7cabeb.
Other vulnerabilities in LMCache
See all- CVE-2026-107206Critical
LMCache through 0.5.5 contains a missing authentication vulnerability in the multiprocess mode HTTP server that allows remote unauthenticated attackers to access management endpoints listening on all interfaces by default. Attackers can read environment credentials via GET /env and configuration via GET /config, clear caches, delete cache objects, and modify tenant quotas to evict other tenants' cached data.
- CVE-2026-107204Critical
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.
- CVE-2026-105192Critical
LMCache multiprocess (distributed) mode opens an unauthenticated ZeroMQ ROUTER socket where workers register and share KV cache blocks. Extension code 1 is passed to DeviceIPCWrapper.Deserialize, which calls pickle.loads while the server is still decoding request arguments and before the handler runs, so a single unauthenticated ZMQ DEALER message to the transport port (default 5555) executes code as the LMCache process user.
- CVE-2026-107207High
LMCache through 0.5.5 contains a server-side request forgery vulnerability in its frontend monitoring service that allows unauthenticated attackers to bypass the proxy allowlist by registering arbitrary hosts. Attackers can add entries via POST /api/proxies and then use /proxy or /proxy2 to reach internal hosts, read responses, and tamper with nodes or stop the heartbeat.
- CVE-2026-107205High
LMCache through 0.5.5 contains a missing authentication vulnerability in the multiprocess coordinator that allows remote unauthenticated attackers to access its HTTP fleet control API listening on all interfaces by default. Attackers can register or deregister instances via /instances, overwrite quotas via /quota endpoints, inject events via /events, and enumerate /directory/keys to disrupt caching and disclose placement metadata.
Original NVD description (English source)
A flaw has been found in LMCache up to 0.5.4. This affects the function hex_hash_to_int16 of the file lmcache/integration/vllm/utils.py of the component KV Cache Handler. Executing a manipulation can lead to use of weak hash. The attack needs to be launched locally. The attack requires a high level of complexity. It is indicated that the exploitability is difficult. The exploit has been published and may be used. Upgrading to version 0.5.5 is able to mitigate this issue. This patch is called ce08eea76ce5898200efee55f4932fd07a7cabeb. It is suggested to upgrade the affected component. A contributor of the project confirms: "hex_hash_to_int16() was introduced in 0.3.1 (PR #882, commit f5174701). It is not present in 0.3.0, and it is still present in 0.4.7 through 0.5.4."
Vulnerability data from NVD (NIST) · CISA KEV · EPSS