CVE Watch8 oct 2026

CVE-2026-100635

SiYuan before v3.8.4 contains an authentication bypass vulnerability in the publish service where session cookies are issued without Secure

CVSS

5.9

Medio

EPSS

0.3%

p26

KEV

—

Exploit Today

0-100

Publicado: 26 sept 2026 · Última mod.: 8 oct 2026 · CWE-319

EPSS · 30d

0.3%EPSS · 30 días0.3%

2026-09-272026-10-25

Descripción técnica

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.

Referencias oficiales

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