HIGHpublic-safe

CVE-2026-93923

NVD: SiYuan through 3.8.4 fails to escape heading style attributes when rendering outline and bookmark dock HTML, allowing stored cross-site scripting. NVD: Attackers can supply crafted notebooks or call administrative endpoints to inject malicious style values that execute in the Electron renderer with full system access. OSV: SiYuan through 3.8.4 Stored XSS via Heading Style Attribute

CVSS
8.6 Severity
HIGH EPSS
0.0060 (46) KEV
-

Source-published summary

Possible impact

Source describes XSS risk. Possible impact: This high severity issue needs human triage to confirm exposure, affected versions, and vendor guidance for XSS risk.

Affected context

Affected product or version requires source confirmation.

Remediation / advisory

Remediation reference present; patch status requires confirmation in the linked advisory.

Why it matters

Source describes XSS risk. Possible impact: This high severity issue needs human triage to confirm exposure, affected versions, and vendor guidance for XSS risk.; CVSS 8.6 (HIGH); EPSS percentile 46; not listed in KEV; Remediation reference present; patch status requires confirmation in the linked advisory; sources: NVD, OSV.

What to verify

Confirm affected product/version, vendor advisory, patch or mitigation, and exposure.

Exposure hint

exposure unknown

Impact tags

XSS risk

Urgency reasons

CVSS HIGHvendor advisory presentrecent updateremediation reference present

Source-derived note

Summary derived from NVD / OSV description; unsafe procedural detail is not shown.

Redaction metadata

source summary used: True
fallback summary used: False
unsafe procedural detail present: false
raw source displayed: false
public summary redacted: true

Remediation handoff

Public-safe static handoff for human/Codex remediation planning. Scan, patch, external execution, and auto remediation are disabled.

Handoff JSON Handoff Markdown Safe Codex prompt

Safety note

This radar shows source-published defensive context only. Exploit procedures, exploit strings, scanner commands, and auto-remediation are not provided.