VYPR
Medium severity5.9NVD Advisory· Published Sep 26, 2026· Updated Sep 26, 2026

CVE-2026-100635

CVE-2026-100635

Description

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.

Affected products

1

Patches

Vulnerability mechanics

References

4

News mentions

0

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