CVE-2026-110628: falha crítica em kanbn kan
Kan 0.5.5 through 0.6.0 Unauthenticated SSRF via /api/download/attatchment
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28Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
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
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Referências
https://github.com/kanbn/kanhttps://github.com/kanbn/kan/blob/v0.6.0/apps/web/src/pages/api/download/attatchment.ts#L21-L52https://github.com/kanbn/kan/blob/v0.6.0/.env.example#L25-L27https://github.com/kanbn/kan/commit/53397d8e81dc1494d94132848c1f0416f1152bd7https://github.com/kanbn/kan/pull/590https://github.com/kanbn/kan/security/advisories/GHSA-qrx8-9hc6-jvqghttps://hackmd.io/@leediay/HyIxU63ofghttps://www.vulncheck.com/advisories/kan-0.5.5-through-0.6.0-unauthenticated-ssrf-via-api-download-attatchment