What’s Vulnerable › Vulnerabilities

CVE-2026-118680: SiYuan 3.8.7 through 3.8.8 Path Traversal via GLOBALROOT Alias

• Severity: medium (CVSS 4.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-28 · updated 2026-10-28
• Weakness: CWE-22

Description

SiYuan 3.8.7 through 3.8.8 fails to normalize Windows GLOBALROOT device-namespace aliases, bypassing the IsSensitivePath denylist. Attackers can invoke importStdMd with a GLOBALROOT-prefixed path to copy the API token and TLS private key into the publicly served assets directory.

Affected products

• siyuan-note siyuan: from 3.8.7 through 3.8.8

References

• https://github.com/siyuan-note/siyuan/security/advisories/GHSA-gg3p-r4g8-vxg2
• https://www.vulncheck.com/advisories/siyuan-3.8.7-through-3.8.8-path-traversal-via-globalroot-alias

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