Server-Side Request Forgery (SSRF) Affecting kanboard package, versions *


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.29% (22nd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-KANBOARD-18470419
  • published31 Jul 2026
  • disclosed30 Jul 2026

Introduced: 30 Jul 2026

CVE-2026-57862  (opens in a new tab)
CWE-918  (opens in a new tab)

How to fix?

There is no fixed version for Debian:unstable kanboard.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kanboard package and not the kanboard package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

Kanboard 1.2.52 and prior contains a server-side request forgery vulnerability that allows authenticated users to bypass SSRF protections by supplying hexadecimal IP address notation in user-controlled URLs. Attackers can submit hexadecimal-encoded internal IP addresses through the web link creation feature, causing cURL to resolve and connect to internal network resources such as cloud instance metadata services, localhost services, and RFC1918 addresses while the isPrivateURL() filter in app/Core/Http/Client.php incorrectly treats the input as safe due to FILTER_VALIDATE_IP rejecting non-dotted-decimal notation.

CVSS Base Scores

version 3.1