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Back to active CVEs
Medium · CVSS 4.4CVE-2026-82650

SiYuan before v3.8.1 Path Traversal via /api/template/renderCVE-2026-82650

Answer in brief

CVE-2026-82650 records a Medium severity (CVSS 4.4) vulnerability in SiYuan before v3.8.1 Path Traversal via /api/template/render. The current sources do not mark it as known exploited. The current feed maps siyuan-note/siyuan (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 30, 2026Updated Aug 31, 2026Source checked Oct 14, 2026First seen by HOL Aug 30, 2026Material review Aug 31, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 4.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 4.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps siyuan-note/siyuan (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
siyuan-note/siyuangeneric>=0 <3.8.13.8.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for siyuan-note/siyuan.
  2. 2Review the reported fix. Update siyuan-note/siyuan to 3.8.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 31, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 30, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

SiYuan 3.8.0 contains a path traversal / sensitive file exposure vulnerability in the RenderTemplate function (kernel/model/template.go), reachable via the POST /api/template/render endpoint (kernel/api/template.go). The endpoint restricts the supplied path only to the workspace directory (util.IsAbsPathInWorkspace) but, unlike the file API's refuseToAccess() blocklist, applies no sensitive-path exclusion. This allows an authenticated attacker to read sensitive workspace files, including conf/conf.json, which contains the API token and cookie signing key. The issue is fixed in v3.8.1.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • PAN-OS: Authenticated Remote Code Execution (RCE) in the Management InterfaceSame generic ecosystem
  • dbt: Unauthenticated Arbitrary SQL Execution in `dbt docs serve`Same generic ecosystem
  • SeaweedFS: Hard-coded SSH host key can be presented by certain standalone SFTP Helm deploymentsSame generic ecosystem
  • Junos OS and Junos OS Evolved: In a scenario with VPN-flowspec and BMP monitoring a specific BGP update causes an rpd crashSame generic ecosystem
  • Junos OS and Junos OS Evolved: A specific BGP ISO-VPN update causes an rpd crash when BMP or NSR is enabledSame generic ecosystem
  • Junos OS and Junos OS Evolved: Unauthenticated network access causes full device takeover when J-Web is enabledSame generic ecosystem

Record context

Vulnerability class
Path Traversal
EPSS
Not reported
CWE IDs
CWE-668
Source
CVE List V5
Source checked
Oct 14, 2026
References
2 linked sources
Open source record