Auth bypass in Lmcache
CVE-2026-107207
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.
Vulnerability class: Broken Authentication
Published .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/LMCache/LMCache/issues/5512 (issue-tracking)
- github.com/LMCache/LMCache (product)
- github.com/LMCache/LMCache/blob/v0.5.5/lmcache/lmcache_frontend/app.py (technical-description)
- github.com/LMCache/LMCache/blob/v0.5.5/lmcache/lmcache_frontend/app.py (technical-description)
- www.vulncheck.com/advisories/lmcache-through-0.5.5-missing-authentication-in-fr… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-107207?
- CVE-2026-107207 is a high-severity vulnerability in Lmcache, classified under Missing Authentication for Critical Function. CVSS score: 7.2/10. Published 2026-10-07.
- How severe is CVE-2026-107207?
- High severity. CVSS v3 base score is 7.2 out of 10.