What is CVE-2026-22888?

CVE-2026-22888 is a high-severity vulnerability in Cybozu Garoon, classified under CWE-231. CVSS score: 7.5/10. Published 2026-02-02.

How severe is CVE-2026-22888?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Cybozu Garoon

CVE-2026-22888

Improper input verification issue exists in Cybozu Garoon 5.0.0 to 6.0.3, which may lead to unauthorized alteration of portal settings, potentially blocking access to the product.

Published 2026-02-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.004 (34.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.7% 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 6.0.3

Weakness classification (CWE)

CWE-231

References

kb.cybozu.support/article/39083/ (Vendor Advisory)
jvn.jp/en/jp/JVN35265756/ (Third Party Advisory)

Frequently asked questions

What is CVE-2026-22888?: CVE-2026-22888 is a high-severity vulnerability in Cybozu Garoon, classified under CWE-231. CVSS score: 7.5/10. Published 2026-02-02.
How severe is CVE-2026-22888?: High severity. CVSS v3 base score is 7.5 out of 10.