CVE-2026-93923Disclosure

LOWCVSS 8.6 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

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

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-79

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Threat summary

2 mentions across 2 observed days
Momentum state: stable

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
Peaked 1d ago at 1 mentions (2026-09-19); latest day: 1
2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters41d
Disclosure
CVE-2026-93923: stored XSS in SiYuan through 3.8.4, unescaped heading style attributes. Executes in Electron renderer with full system access. CVSS 8.8, no patch yet. Treat untrusted notebooks with caution. https://www.valtersit.com/cve/CVE-2026-93923/ #CVE #infosec #SiYuan #SiYuan #CVEALERT #CVE #infosec #Linux #XSS #valtersit #snippet #SysAdmin #cybersecurity #devsecops #devops #developer #100daysofcode #git #github #gitlab #redteam #blueteam #ethicalhacker #cybersecurityawareness #cybersecuritynews #cybersecuritytips #python #hacker #kali #ubuntu #debian #docker
Post summary
The text announces a stored XSS vulnerability in SiYuan (CVE-2026-93923) with a CVSS score of 8.8, detailing its execution in the Electron renderer, while noting that no patch is currently available.
0000046
1.1K followersView on X
CVE@CVEnew45d
Disclosure
CVE-2026-93923 SiYuan through 3.8.4 fails to escape heading style attributes when rendering outline and bookmark dock HTML, allowing stored cross-site scripting. Attackers can suppl… https://www.cve.org/CVERecord?id=CVE-2026-93923
Post summary
The text discloses CVE-2026-93923, detailing a stored XSS flaw in SiYuan versions up to 3.8.4 caused by improper escaping of heading style attributes, and links to the official CVE record.
00000820
58.1K followersView on X

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