CVE-2026-107205

HIGH 8.6

LMCache through 0.5.5 Missing Authentication in MP Coordinator Fleet Control API

CVSS Score

8.6

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306
Vendor	lmcache
Product	lmcache
Published	Oct 7, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

High

Affected Versions

LMCache / LMCache

0 ≤ 0.5.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Mingkai Yu Jiajia Liu