CVE-2026-21880 Kanboard LDAP Injection Vulnerability can Lead to User Enumeration and Information Disclosure
Attackers can inject LDAP queries to enumerate users and disclose sensitive attributes, requiring LDAP authentication to be enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21880?
CVE-2026-21880 is a medium-severity vulnerability in kanboard, published on 8 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-21880?
It affects 1 product.
Products include Kanboard Kanboard.
How do I fix CVE-2026-21880?
No fix has been published for CVE-2026-21880 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-21880 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-21880 exists.
Other vulnerabilities in kanboard
- CVE-2026-21881 Kanboard is Vulnerable to Reverse Proxy Authentication Bypass
- CVE-2025-55010 Kanboard Authenticated Admin Remote Code Execution via Unsafe Deserialization of Events
- CVE-2024-51747 Arbitrary File Read and Delete in kanboard
- CVE-2024-51748 Remote code execution through language setting in kanboard
- CVE-2017-12850 Business logic in n/a
Sources
Also known as GHSA-v66r-m28r-wmq7.