Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| LMCache | LMCache | ≤ 0.5.5 | — |
References
- GitHub Issue #5512 issue-tracking
- https://github.com/LMCache/LMCache product
- https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/lmcache_frontend/app.py#L411-L428 technical-description
- https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/lmcache_frontend/app.py#L567-L604 technical-description
- VulnCheck Advisory: LMCache through 0.5.5 Missing Authentication in Frontend Node Catalog Allows SSRF Allowlist Bypass third-party-advisory