CVE-2026-72807Public exploitNetwork attack vector

Cross-notebook data access via queryBlocks SQL injection

Published Aug 12, 2026 · Updated Aug 12, 2026

SQL injection in SiYuan before 3.7.4 allows attackers to read and write notebook data through crafted imported template columns. The queryBlocks function passes an attacker-controlled template argument to SelectBlocksRawStmt, replacing question marks with strings instead of binding parameters on the read-write database handle. Exploitation requires a victim to import and render a malicious SiYuan document or attribute-view package; stacked statements then permit cross-notebook reads and writes.

CVSS severity8.0
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in SiYuan before 3.7.4 allows attackers to read and write notebook data through crafted imported template columns. The queryBlocks function passes an attacker-controlled template argument to SelectBlocksRawStmt, replacing question marks with strings instead of binding parameters on the read-write database handle. Exploitation requires a victim to import and render a malicious SiYuan document or attribute-view package; stacked statements then permit cross-notebook reads and writes.

The record

CVE
CVE-2026-72807
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
SiYuan Note
Product
SiYuan
Classifications
CWE-1336, CWE-89, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.7.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SiYuan Note · SiYuanversion=0 <3.7.4

Published CVSS scores

8.0GitHub Security AdvisoryCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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