Threats Tagged 'cve-2026-74905'
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Threats Tagged 'cve-2026-74905'
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CVE-2026-74905: Server-Side Request Forgery (SSRF) in siyuan-note siyuanCVE-2026-74905 0 SiYuan before v3.7.4 contains a server-side request forgery (SSRF) vulnerability in the isPrivateIP function in kernel/util/net.go, used by SSRFSafeDialer to enforce SSRF protection in SafeMode. The function only checks for loopback, link-local unicast, private, and unspecified addresses and does not recognize IPv6 transition addresses (NAT64 64:ff9b::/96, 6to4 2002::/16, Teredo 2001::/32) that embed private IPv4 destinations. When SafeMode is enabled, an authenticated attacker can bypass the SSRF guard via the network forward proxy, WebSocket proxy, or SSE proxy endpoints by supplying a URL whose hostname resolves to such a transition address, reaching internal services and cloud metadata endpoints (e.g., 169.254.169.254). Because the forward proxy returns the full response body, this is a full-read SSRF that can be used to steal instance credentials, reach internal services, and port-scan internal infrastructure. Join the discussion | CVE Database V5 | 08/18/2026, 11:19:36 UTC Added: 08/18/2026, 11:35:00 UTC |
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