CVE-2026-75917Public exploit

Code execution via aria-label attribute breakout

Published Aug 19, 2026 · Updated Aug 20, 2026

Cross-site scripting in SiYuan before 3.7.4 allows attackers to execute OS commands via crafted document metadata shown in path-picker tooltips. In app/src/util/pathName.ts, getLeaf() builds the aria-label HTML for movePathTo()-driven file-tree entries by concatenating bookmark, alternate-name, alias, and memo fields into a double-quoted attribute without escaping, so a double quote breaks attribute context and injects an inline handler. Exploitation requires a malicious document to reach the victim through sharing, sync, or import and the victim to hover its entry in a move or link dialog; in Electron windows with nodeIntegration enabled and no context isolation, that handler can invoke child_process at the victim's OS privilege level.

CVSS severity9.3
Critical
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in SiYuan before 3.7.4 allows attackers to execute OS commands via crafted document metadata shown in path-picker tooltips. In app/src/util/pathName.ts, getLeaf() builds the aria-label HTML for movePathTo()-driven file-tree entries by concatenating bookmark, alternate-name, alias, and memo fields into a double-quoted attribute without escaping, so a double quote breaks attribute context and injects an inline handler. Exploitation requires a malicious document to reach the victim through sharing, sync, or import and the victim to hover its entry in a move or link dialog; in Electron windows with nodeIntegration enabled and no context isolation, that handler can invoke child_process at the victim's OS privilege level.

The record

CVE
CVE-2026-75917
Published
Aug 19, 2026
Updated
Aug 20, 2026
Vendor
SiYuan Note
Product
SiYuan
Classifications
CWE-79, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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 vectorlocal
Required privilegesunauthenticated

What is affected?

SiYuan Note · SiYuanversion=0 <3.7.4

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
8.6VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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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