DEBIAN-CVE-2026-21881

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Source
https://security-tracker.debian.org/tracker/CVE-2026-21881
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-21881.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-21881
Upstream
Withdrawn
2026-05-07T20:01:46Z
Published
2026-01-08T02:15:53Z
Modified
2026-05-07T20:01:46Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
Summary
[none]
Details

Kanboard is project management software focused on Kanban methodology. Versions 1.2.48 and below is vulnerable to a critical authentication bypass when REVERSE_PROXY_AUTH is enabled. The application blindly trusts HTTP headers for user authentication without verifying the request originated from a trusted reverse proxy. An attacker can impersonate any user, including administrators, by simply sending a spoofed HTTP header. This issue is fixed in version 1.2.49.

References

Affected packages

Debian:14 / kanboard

Package

Name
kanboard
Purl
pkg:deb/debian/kanboard?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.2.49+ds-1

Affected versions

1.*
1.2.22+ds-1
1.2.23+ds-1
1.2.23+ds-1.1
1.2.25+ds-1
1.2.25+ds-2
1.2.25+ds-3
1.2.26+ds-1
1.2.26+ds-2
1.2.26+ds-3
1.2.26+ds-4
1.2.30+ds-1
1.2.31+ds-1
1.2.31+ds2-1
1.2.44+ds-1
1.2.47+ds-1
1.2.47+ds-2
1.2.48+ds-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-21881.json"