How severe is CVE-2026-21880?

CVE-2026-21880 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-21880 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21880?

CVE-2026-21880 affects Kanboard. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-21880?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-21880 have an EU (EUVD) identifier?

Yes. CVE-2026-21880 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1666.

When was CVE-2026-21880 published?

CVE-2026-21880 was published on 2026-01-08 and last updated on 2026-06-17.

CVE-2026-21880

CVE-2026-21880 is a medium-severity vulnerability in Kanboard with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-90.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-1666
Weakness: CWE-90
Affected product: Kanboard
Published: 2026-01-08
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-21880?: CVE-2026-21880 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-21880 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21880?: CVE-2026-21880 affects Kanboard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21880?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-21880 have an EU (EUVD) identifier?: Yes. CVE-2026-21880 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-1666.
When was CVE-2026-21880 published?: CVE-2026-21880 was published on 2026-01-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:kanboard:kanboard:*:*:*:*:*:*:*:*

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