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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://github.com/LMCache/LMCache
disclosure@vulncheck.com
https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/lmcache_frontend/app.py#…
disclosure@vulncheck.com
https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/lmcache_frontend/app.py#…
disclosure@vulncheck.com
https://github.com/LMCache/LMCache/issues/5512
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/lmcache-through-0.5.5-missing-authenticati…
disclosure@vulncheck.com