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Advisories

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

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Severity
critical
Date
Affecting

  • kan >= 0.5.5, <= 0.6.0

CWE
  • CWE-918 Server-Side Request Forgery (SSRF)
CVSS
9.2
CVSS V4 Vector
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
Credit
leediay153 from Viettel Post
Description
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.

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