CVE-2026-107205

LMCache through 0.5.5 contains a missing authentication vulnerability in the multiprocess coordinator that allows remote unauthenticated attackers to access its HTTP fleet control API listening on all interfaces by default. Attackers can register or deregister instances via /instances, overwrite quotas via /quota endpoints, inject events via /events, and enumerate /directory/keys to disrupt caching and disclose placement metadata.

CVSS 4.0

8.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 33% of CVEs (scores of 2026-10-25)

CWE

CWE-306

Published

2026-10-07

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

References

• https://github.com/LMCache/LMCache
• https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/mp_coordinator/app.py#L238-L246
• https://github.com/LMCache/LMCache/blob/v0.5.5/lmcache/v1/mp_coordinator/config.py#L71
• https://github.com/LMCache/LMCache/issues/5508
• https://www.vulncheck.com/advisories/lmcache-through-0.5.5-missing-authentication-in-mp-coordinator-fleet-control-api

Check your stackJSON