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CVE-2026-100635 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:4.2 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

CNA: [email protected]CVSS-B:5.9 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/siyuan-note/siyuan/commit/79d47867b106467c951475a9193455b48d1f3682	[email protected]	Source CodeVendor
https://github.com/siyuan-note/siyuan/commit/ff4d215f78a8d6e6db6052be18b5f9f4db9c7d68	[email protected]	Source CodeVendor
https://github.com/siyuan-note/siyuan/security/advisories/GHSA-7j37-4gq6-wm7m	[email protected]	AdvisoryBundleRemedy
https://www.vulncheck.com/advisories/siyuan-before-3.8.4-authentication-bypass-via-plaintext-session-cookie	[email protected]	AdvisoryRemedy

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-319	Cleartext Transmission of Sensitive Information	[email protected]

Affected Products

Product	Versions
SiYuan	>= 0, < 3.8.4
CPE cpe:2.3:a:b3log:siyuan:::::::: Remediation Upgrade: v3.8.4moderate effort

Change History

1 change record found show changes