SiYuan: A parser differential between the WebSocket keepalive exemption and the session quarantine allows unauthenticated access to the broadcast event stream

影響: go:github.com/siyuan-note/siyuan/kernel < 0.0.0-20260731131820-67bc300b6ea6 → 0.0.0-20260731131820-67bc300b6ea6

Two checks on the same WebSocket request URI parse it differently. The authentication exemption for keepalive sessions matches raw substrings, while the quarantine introduced to contain those sessions reads a parsed query parameter. Because Go's url.Values.Get returns only the first value for a repeated key, a single URI can satisfy the exemption and still resolve to a non-auth session identity. The result is that an unauthenticated remote caller connects to the kernel WebSocket with a valid ac…

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2026. 10. 24. 오전 03:34, GitHub Advisory Database에서 "SiYuan: A parser differential between the WebSocket keepalive exemption and the session quarantine allows unauthenticated access to the broadcast event stream"을(를) 게시했습니다 (유형: 취약점 권고). 심각도는 "높음"(high)입니다. 관련 기술: Go, GitHub. CVE: CVE-2026-73054.