What is CVE-2026-109848?

CVE-2026-109848 is a medium-severity vulnerability in Growi, Inc. Growi, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.2/10. Published 2026-10-28.

How severe is CVE-2026-109848?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Auth bypass in Growi, Inc. Growi

CVE-2026-109848

GROWI contains an authorization bypass vulnerability in its tag update API and the page update API due to improper use of a user-controlled key. By exploiting this vulnerability, an attacker who can log in to the product may obtain the contents of pages without the required read permission and save them to pages that the attacker can edit.

Vulnerability class: IDOR (Insecure Direct Object Reference)

Published 2026-10-28 · last modified 2026-10-28.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (12.8th percentile), scored 2026-10-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

The 30-day trend appears once there are two daily scores.

Affected products

Growi, Inc. Growi

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

Frequently asked questions

What is CVE-2026-109848?: CVE-2026-109848 is a medium-severity vulnerability in Growi, Inc. Growi, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.2/10. Published 2026-10-28.
How severe is CVE-2026-109848?: Medium severity. CVSS v3 base score is 4.2 out of 10.