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

Quick assessment

Affected

siyuan-note siyuan

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SiYuan 3.8.7 至 3.8.8 版本未能对 Windows 的 GLOBALROOT 设备命名空间别名进行规范化处理，从而绕过了 IsSensitivePath 的拒绝访问列表。攻击者可利用以 GLOBALROOT 为前缀的路径调用 importStdMd 函数，将 API 令牌和 TLS 私钥复制到公开提供的资源目录中。

CVSS 4.4 · Medium Updated Oct 29, 2026

Possible ATT&CK Techniques 1 AI

T1562.001

Affected Version Matrix 1

Vendor	Product	Version Range	Status
siyuan-note	siyuan	`3.8.7≤ 3.8.8`	affected

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

SiYuan 3.8.7 through 3.8.8 Path Traversal via GLOBALROOT Alias

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

对路径名的限制不恰当(路径遍历)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
siyuan-note	siyuan	3.8.7 ~ 3.8.8	-

II. Public POCs for CVE-2026-118680

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-118680

请登录查看更多情报信息。

Other References for CVE-2026-118680 (2)

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

https://www.cve.org/CVERecord?id=CVE-2026-118680

IV. Related Vulnerabilities

Same product: siyuan

Same vendor: siyuan-note

Same weakness: CWE-22