CVE-2026-73053

CRITICALPre-NVD 9.09.0—
EchelonGraph scoreHIGH confidence

Score 9.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-16. a secondary CVSS source baseline 9.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
9.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.0Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

SiYuan versions before v3.7.4 contain a cross-site scripting vulnerability in the unicode2Emoji function that fails to sanitize codepoint branch output. Attackers can craft document icons with hex-encoded markup that executes in the renderer with Node integration enabled, achieving arbitrary code execution on the host system.

CVSS v3
9.0
EG Score
9.0(high)
EG Risk
57(Track*)
EG Risk 57/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 18, 2026

Advisory Details (2)

Auto-updated Aug 15, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

SiYuan before v3.7.4 Cross-Site Scripting via unicode2Emoji | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-cross-site-scripting-via-unicode2emoji
github Patch Available🟡 PoC Available

A single unsanitized branch in unicode2Emoji turns a document icon into Remote Code Execution on the desktop client · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-vx5w-qrvp-mmcq

Vendor Advisories for CVE-2026-73053(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 50× in last 7d / 50× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 08:33 UTCGHSA enrichment
  2. 2026-08-21 04:21 UTCGHSA enrichment
  3. 2026-08-21 00:08 UTCEG score recompute
  4. 2026-08-21 00:08 UTCGHSA enrichment
  5. 2026-08-20 22:56 UTCEPSS rescore
  6. 2026-08-20 19:57 UTCGHSA enrichment
  7. 2026-08-20 15:46 UTCGHSA enrichment
  8. 2026-08-20 11:34 UTCGHSA enrichment
  9. 2026-08-20 07:21 UTCGHSA enrichment
  10. 2026-08-20 03:10 UTCGHSA enrichment
  11. 2026-08-19 22:58 UTCGHSA enrichment
  12. 2026-08-19 18:46 UTCEG score recompute
  13. 2026-08-19 18:46 UTCGHSA enrichment
  14. 2026-08-19 17:04 UTCEPSS rescore
  15. 2026-08-19 14:34 UTCGHSA enrichment
  16. 2026-08-19 10:16 UTCGHSA enrichment
  17. 2026-08-19 06:04 UTCGHSA enrichment
  18. 2026-08-19 01:50 UTCGHSA enrichment
  19. 2026-08-18 21:37 UTCGHSA enrichment
  20. 2026-08-18 16:59 UTCEG score recompute
  21. 2026-08-18 16:59 UTCGHSA enrichment
  22. 2026-08-18 13:49 UTCEPSS rescore
  23. 2026-08-18 13:49 UTCEPSS rescore
  24. 2026-08-18 11:49 UTCGHSA enrichment
  25. 2026-08-18 07:37 UTCGHSA enrichment
Show 25 more
  1. 2026-08-18 03:24 UTCEG score recompute
  2. 2026-08-18 03:23 UTCGHSA enrichment
  3. 2026-08-18 02:41 UTCEG score recompute
  4. 2026-08-18 02:41 UTCGHSA enrichment
  5. 2026-08-18 00:55 UTCGHSA enrichment
  6. 2026-08-17 20:40 UTCGHSA enrichment
  7. 2026-08-17 16:28 UTCEG score recompute
  8. 2026-08-17 16:28 UTCGHSA enrichment
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-17 12:11 UTCGHSA enrichment
  11. 2026-08-17 07:59 UTCGHSA enrichment
  12. 2026-08-17 03:48 UTCGHSA enrichment
  13. 2026-08-16 23:37 UTCGHSA enrichment
  14. 2026-08-16 19:25 UTCGHSA enrichment
  15. 2026-08-16 15:14 UTCEG score recompute
  16. 2026-08-16 15:14 UTCGHSA enrichment
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 14:56 UTCEPSS rescore
  19. 2026-08-16 11:02 UTCGHSA enrichment
  20. 2026-08-16 06:51 UTCGHSA enrichment
  21. 2026-08-16 02:40 UTCEG score recompute
  22. 2026-08-16 02:40 UTCGHSA enrichment
  23. 2026-08-15 22:29 UTCEG score recompute
  24. 2026-08-15 21:53 UTCEG score recompute
  25. 2026-08-15 21:52 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73053?
CVE-2026-73053 is a critical vulnerability published on August 15, 2026. SiYuan versions before v3.7.4 contain a cross-site scripting vulnerability in the unicode2Emoji function that fails to sanitize codepoint branch output. Attackers can craft document icons with hex-encoded markup that executes in the renderer with Node integration enabled, achieving arbitrary code…
When was CVE-2026-73053 disclosed?
CVE-2026-73053 was first published in the National Vulnerability Database on August 15, 2026, with the most recent update on August 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73053 actively exploited?
CVE-2026-73053 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.0% of all scored CVEs.
What is the CVSS score of CVE-2026-73053?
CVE-2026-73053 has a CVSS v3 base score of 9.0 (NVD).
How do I remediate CVE-2026-73053?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73053, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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