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Back to active CVEs
High · CVSS 8.2CVE-2026-82234GHSA-X8GV-G2G3-65FJ

SiYuan before v3.8.1 SSRF via DNS-Rebinding TOCTOUCVE-2026-82234

Answer in brief

CVE-2026-82234 records a High severity (CVSS 8.2) vulnerability in SiYuan before v3.8.1 SSRF via DNS-Rebinding TOCTOU. The current sources do not mark it as known exploited. The current feed maps siyuan-note/siyuan (generic), github.com/siyuan-note/siyuan/kernel (go), github.com/siyuan-note/siyuan/kernel (go). 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 28, 2026Updated Oct 2, 2026Source checked Oct 12, 2026First seen by HOL Oct 2, 2026Material review Oct 2, 2026
Upstream Advisory

Record context

Vulnerability class
SSRF
EPSS
Not reported
CWE IDs
CWE-918
Source
CVE List V5
Source checked
Oct 12, 2026
References
6 linked sources
Open source record

Key facts

Risk
High · CVSS 8.2
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.2. 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), github.com/siyuan-note/siyuan/kernel (go), github.com/siyuan-note/siyuan/kernel (go). 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
github.com/siyuan-note/siyuan/kernelgo<0.0.0-20260813142806-dd2778b70d020.0.0-20260813142806-dd2778b70d02
github.com/siyuan-note/siyuan/kernelgo>=0 <0.0.0-20260813142806-dd2778b70d020.0.0-20260813142806-dd2778b70d02

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for siyuan-note/siyuan, github.com/siyuan-note/siyuan/kernel, github.com/siyuan-note/siyuan/kernel.
  2. 2Review the reported fix. Update siyuan-note/siyuan to 3.8.1; github.com/siyuan-note/siyuan/kernel to 0.0.0-20260813142806-dd2778b70d02; github.com/siyuan-note/siyuan/kernel to 0.0.0-20260813142806-dd2778b70d02 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 28, 2026

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

  2. Source modified

    Oct 2, 2026

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

  3. First seen by HOL

    Oct 2, 2026

Sources and claim methodology

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

SiYuan versions before v3.8.1 contain a server-side request forgery vulnerability in the http_request and web_fetch agent tools that perform DNS resolution only at guard time without validating the connect-time resolution. Attackers can use DNS rebinding to answer the guard resolution with a public IP and the connect resolution with a private or metadata IP, bypassing the SSRF defense to access cloud instance metadata and internal services.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • LogicalDOC Community Edition through 9.3 SSRF via XMLConverter xml-stylesheet hrefAlso CWE-918
  • Unauthenticated queue manipulation through connector SSRF and response injection in Progress ShareFile Storage Zones ControllerAlso CWE-918
  • Untrusted request routing and forged acknowledgements permit copy-workflow manipulation in Progress ShareFile Storage Zones ControllerAlso CWE-918
  • hex_core's default HTTP adapter doesn't verify TLS certificates on OTP 24 and 25Same generic ecosystem
  • ImageMagick before 7.1.2-33 Policy Bypass via Symlink in IsRightsAuthorizedByNameSame generic ecosystem
  • Yungengxin Cloud Billing IOCTL Process Termination LWBilling64.sys sub_14000443C exposed ioctl with insufficient access controlSame generic ecosystem