CVE-2026-65607 siyuan-note CVE debrief

Who should care

Users of SiYuan before v3.7.2, administrators, security teams, and vulnerability management teams should be aware of this vulnerability and take necessary actions to prevent exploitation. This includes applying the patch to upgrade SiYuan to v3.7.2 or later, restricting access to the serveExport handler, and monitoring for suspicious activity.

Technical summary

The vulnerability exists in the serveExport handler of SiYuan before v3.7.2. The /export/temp/ short-circuit branch joins the raw, percent-decoded request path with util.TempDir and serves the file without the IsSubPath or IsSensitivePath checks. An authenticated attacker can exploit this vulnerability by sending percent-encoded traversal sequences to read arbitrary files outside TempDir, including /etc/passwd, SSH keys, and SiYuan workspace files. The vulnerability has a CVSS score of 7.1 and is considered High severity.

Defensive priority

High

Recommended defensive actions

• Apply the patch to upgrade SiYuan to v3.7.2 or later
• Restrict access to the serveExport handler
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-07-23T12:18:47.633Z and was last modified on 2026-07-27T17:16:40.020Z. The NVD entry is currently Deferred. The vulnerability has been publicly disclosed and an authenticated attacker can exploit this vulnerability. Evidence is limited to public sources and vendor statements.

Official resources