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…

Read on GitHub Advisory Database

On 10/24/2026, 03:34 AM, GitHub Advisory Database published "SiYuan: A parser differential between the WebSocket keepalive exemption and the session quarantine allows unauthenticated access to the broadcast event stream" (type: Advisory). Severity is "High" (high). Related technologies: Go, GitHub. CVE: CVE-2026-73054.