Auth bypass in Lmcache
CVE-2026-107206
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H.
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/5511 (issue-tracking)
- github.com/LMCache/LMCache (product)
- github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/multiprocess/config.py (technical-description)
- github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/internal_api_server/common/en… (technical-description)
- github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/multiprocess/http_apis/quota_… (technical-description)
- www.vulncheck.com/advisories/lmcache-through-0.5.5-missing-authentication-in-mp… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-107206?
- CVE-2026-107206 is a critical-severity vulnerability in Lmcache, classified under Missing Authentication for Critical Function. CVSS score: 9.4/10. Published 2026-10-07.
- How severe is CVE-2026-107206?
- Critical severity. CVSS v3 base score is 9.4 out of 10.