CVE-2026-100635

Published: Set 26, 2026 Last Modified: Set 28, 2026

ExploitDB:

Other exploit source:

Google Dorks:

HIGH 8,2

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: none

User Interaction: none

Confidentiality: N/A

Integrity: N/A

Availability: N/A

MEDIUM 5,9

Source: [email protected]

Attack Vector: network

Attack Complexity: high

Privileges Required: none

User Interaction: none

Scope: unchanged

Confidentiality: high

Integrity: none

Availability: none

Description

AI Translation Available

SiYuan before v3.8.4 contains an authentication bypass vulnerability in the publish service where session cookies are issued without Secure or SameSite attributes over plaintext HTTP connections. An on-path attacker can observe a valid publish-visitor-session-id cookie from a Basic Auth exchange and replay it to access authenticated publish endpoints without knowing the account password.