What is CVE-2026-97864?

CVE-2026-97864 is a medium-severity vulnerability in Gibbonedu Gibbon, classified under Improper Authentication. CVSS score: 5.3/10. Published 2026-09-25.

How severe is CVE-2026-97864?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Gibbonedu Gibbon

CVE-2026-97864

A vulnerability has been found in GibbonEdu Gibbon up to 30.0.01. The affected element is the function makeBlock of the file modules/Planner/units_add_blockAjax.php of the component Unit Planner. The manipulation of the argument gibbonUnitBlockID/mode leads to missing authentication. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 31.0.00 is sufficient to fix this issue. The identifier of the patch is 07e719368eae8dfb4e22e19424ceab6074164ebc. It is recommended to upgrade the affected component.

Vulnerability class: Broken Authentication

Published 2026-09-25 · last modified 2026-09-28.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.6th percentile), scored 2026-11-10.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.006 · change: -0.002

Affected products

Gibbonedu Gibbon — versions 30.0.01

Weakness classification (CWE)

References

VDB-409878 | GibbonEdu Gibbon Unit Planner units_add_blockAjax.php makeBlock missing authentication (technical-description, vdb-entry)
VDB-409878 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
CVE-2026-97864 | CVE Analysis and Report (third-party-advisory)
Submit #911004 | Gibbon Gibbon (GibbonEdu core) 30.0.01 Missing Authentication (third-party-advisory)
github.com/GibbonEdu/core/pull/2090 (issue-tracking, patch)
github.com/GibbonEdu/core/pull/2095 (issue-tracking, patch)
github.com/GibbonEdu/core/commit/07e719368eae8dfb4e22e19424ceab6074164ebc (patch)
github.com/GibbonEdu/core/compare/v31.0.00 (patch)

Frequently asked questions

What is CVE-2026-97864?: CVE-2026-97864 is a medium-severity vulnerability in Gibbonedu Gibbon, classified under Improper Authentication. CVSS score: 5.3/10. Published 2026-09-25.
How severe is CVE-2026-97864?: Medium severity. CVSS v3 base score is 5.3 out of 10.