What is CVE-2026-21880?

CVE-2026-21880 is a medium-severity vulnerability in Kanboard, classified under LDAP Injection. CVSS score: 5.3/10. Published 2026-01-08.

How severe is CVE-2026-21880?

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

LDAP Injection in Kanboard

CVE-2026-21880

Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below have an LDAP Injection vulnerability in the LDAP authentication mechanism. User-supplied input is directly substituted into LDAP search filters without proper sanitization, allowing attackers to enumerate all LDAP users, discover sensitive user attributes, and perform targeted attacks against specific accounts. This issue is fixed in version 1.2.49.

EPSS: 0.004 (27.9th percentile) — read the EPSS interpretation.

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.

Affected products

Kanboard — versions < 1.2.49

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-21880?: CVE-2026-21880 is a medium-severity vulnerability in Kanboard, classified under LDAP Injection. CVSS score: 5.3/10. Published 2026-01-08.
How severe is CVE-2026-21880?: Medium severity. CVSS v3 base score is 5.3 out of 10.