Vulnerability in LMCache

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)
• Critical severity: CVSS 9.4

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• github.com/LMCache/LMCache
• github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/internal_api_server/common/env_api.py
• github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/multiprocess/config.py
• github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/multiprocess/http_apis/quota_api.py
• github.com/LMCache/LMCache/issues/5511
• www.vulncheck.com/advisories/lmcache-through-0.5.5-missing-authentication-in-mp-http-se…