CVE-2026-32938: SiYuan Vulnerable to Arbitrary File Read in Desktop Publish Service

Should you act?

Critical, preconditions apply

Severe if exploited, but exploitation needs conditions that may not apply to you. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

• Not in CISA KEV, but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
• EPSS 0.6%, percentile 47: FIRST’s model estimates a 0.6% chance of exploitation activity in the next 30 days, higher than 47% of all scored CVEs (low). EPSS is a probability, not a verdict.
• Needs an account (low (any account)). Exposure depends on who can log in.
• Only applies if your dependency tree includes github.com/siyuan-note/siyuan/kernel (Go) <= 0.0.0-20260313024916-fd6526133bb3, no fixed version listed. Check your lockfile, including transitive dependencies.

What it is

SiYuan is a personal knowledge management system. In versions 3.6.0 and below, the /api/lute/html2BlockDOM on the desktop copies local files pointed to by file:// links in pasted HTML into the workspace assets directory without validating paths against a sensitive-path list. Together with GET /assets/path, which only requires authentication, a publish-service visitor can cause the desktop kernel to copy any readable sensitive file and then read it via GET, leading to exfiltration of sensitive files. This issue has been fixed in version 3.6.1.

From the GitHub advisory

Summary

In SiYuan, /api/lute/html2BlockDOM on the desktop copies local files pointed to by file:// links in pasted HTML into the workspace assets directory without validating paths against a sensitive-path list. Together with GET /assets/path, which only requires authentication, a publish-service visitor can cause the desktop kernel to copy any readable sensitive file and then read it via GET, leading to exfiltration of sensitive files.

Details

1. Arbitrary local files copied into workspace

- Endpoint: POST /api/lute/html2BlockDOM, protected only by model.CheckAuth; publish read-only role is not restricted. - Behavior: On desktop (util.ContainerStd == model.Conf.System.Container), local absolute paths from in the HTML are copied to {DataDir}/assets/. - Missing check: The code does not call util.IsSensitivePath(localPath) before copying, so any readable file (e.g. /etc/passwd, ~/.ssh/idrsa) can be copied into assets.

Weakness type: CWE-22, CWE-200, CWE-284.

Product: github.com/siyuan-note/siyuan/kernel (Go) · Assigned by: GitHub_M · Published: 2026-03-20

Affected and fixed versions

Severity scores

• Attack vector: network (remotely reachable)
• Attack complexity: low
• Privileges required: low (any account)
• User interaction: none
• Scope: changed (can affect other components)

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

• CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
• CISA SSVC assessment: exploitation poc, automatable no, technical impact total.
• FIRST EPSS (model of 2026-10-21): 0.58% probability of exploitation activity in the next 30 days; percentile 47.

Timeline

• 2026-03-17 — GitHub-reviewed advisory GHSA-fq2j-j8hc-8vw8 published (critical)
• 2026-03-20 — CVE record last updated
• 2026-03-20 — CVE record published by GitHub_M

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vulnerability records

1. GitHub Advisory GHSA-fq2j-j8hc-8vw8 github.com
2. CVE.org record CVE-2026-32938 cve.org
3. NVD entry CVE-2026-32938 nvd.nist.gov

Other references from the CVE record and advisory

1. github.com github.com
2. github.com github.com
3. github.com github.com

Critical Go advisories · Today’s Security Digest