What is CVE-2024-31399?

CVE-2024-31399 is a medium-severity vulnerability in Cybozu Garoon, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2024-06-11.

How severe is CVE-2024-31399?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Cybozu Garoon

CVE-2024-31399

Excessive platform resource consumption within a loop issue exists in Cybozu Garoon 5.0.0 to 5.15.2. If this vulnerability is exploited, processing a crafted mail may cause a denial-of-service (DoS) condition.

Vulnerability class: DoS (Denial of Service)

Published 2024-06-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Cybozu Garoon
Cybozu, Inc. Cybozu Garoon — versions 5.0.0 to 5.15.2

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

cs.cybozu.co.jp/2024/007901.html (Vendor Advisory)
jvn.jp/en/jp/JVN28869536/ (Third Party Advisory)

Frequently asked questions

What is CVE-2024-31399?: CVE-2024-31399 is a medium-severity vulnerability in Cybozu Garoon, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2024-06-11.
How severe is CVE-2024-31399?: Medium severity. CVSS v3 base score is 6.5 out of 10.