CVE-2026-110628criticalCWE-918

CVE-2026-110628: critical vulnerability in kanbn kan

Kan 0.5.5 through 0.6.0 Unauthenticated SSRF via /api/download/attatchment

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28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 9.2epss 0.4%
Kan 0.5.5 through 0.6.0 contains an unauthenticated server-side request forgery vulnerability in the /api/download/attatchment route due to an incomplete fix for CVE-2026-32255. When S3_ENDPOINT is unset, attackers can pass arbitrary url query parameters to fetch() to read internal services, localhost ports, and cloud instance metadata.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
Affected products
kanbn · kan
Related CVEs — kanbn kan

In the same product, most dangerous first.

CVE-2026-32255HIGHKan is Vulnerable to Unauthenticated SSRF via Attachment Download EndpointEPSS 26.9%CVE-2026-92802MEDIUMkan through 0.6.0 Authorization Bypass via GitHub Project ImportEPSS 0.4%