CVE-2026-73042

CRITICALPre-NVD 9.09.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week
9.0EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.0Exploit: None knownExposed services: Not assessed

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

The CVE record's CNA (VulnCheck) lists siyuan-note siyuan versions before 3.7.4 as affected, and siyuan-note siyuan versions 3.7.4 as unaffected. No release containing a fix is confirmed on record.

SiYuan before v3.7.4 fails to properly escape database menu metadata in HTML interpolation, allowing stored values to execute script when users open group, view, or field-edit menus. Attackers can inject markup through field descriptions or names that close containing elements and execute arbitrary code via event handlers, reaching Node built-ins due to Electron's insecure configuration.

CVSS v3
9.0
EG Score
9.0CRITICALmedium confidence
EG Risk
41
EG Risk 41/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity90% × 45%
Impact severity (EG Severity): CVSS 9.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.0): severity, escalated by confirmed exploitation. This CVE's 9.0 is its impact severity (EG Severity), not escalated.

EG Severity
9.0 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-18). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 15, 2026

Last Modified

August 26, 2026

Advisory Details (2)

Auto-updated Aug 15, 2026
No fix on record yet. Sources: github.
Web page

SiYuan before v3.7.4 Remote Code Execution via Menu Metadata | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-remote-code-execution-via-menu-metadata
GitHub advisoryMentions a patch (unverified)

Database menu labels are escaped in the attribute and left raw in the body of the same line, turning a field description into Remote Code Execution on the desktop client · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-gcm3-qcq3-72rv

Vendor Advisories for CVE-2026-73042(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 19× in last 7d / 124× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 380 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 280 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  2. 2026-10-19 11:29 UTCEG score recompute
  3. 2026-10-19 11:29 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  4. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-10-18 09:07 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  6. 2026-10-18 03:15 UTCEG score recompute
  7. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-17 08:11 UTCEG score recompute
  9. 2026-10-17 08:11 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  10. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-10-16 07:15 UTCEG score recompute
  12. 2026-10-16 07:15 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  13. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-10-15 06:07 UTCEG score recompute
  15. 2026-10-15 06:07 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  16. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-10-14 01:44 UTCEG score recompute
  18. 2026-10-14 01:43 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  19. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-10-12 21:55 UTCEG score recompute
  21. 2026-10-12 21:55 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  22. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  23. 2026-10-12 15:41 UTCEG score recompute
  24. 2026-10-12 05:44 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  25. 2026-10-11 19:26 UTCEG score recompute
Show 75 more
  1. 2026-10-11 16:42 UTCEG score recompute
  2. 2026-10-11 14:02 UTCEG score recompute
  3. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  4. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  5. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  6. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  7. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-07 06:29 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  9. 2026-10-07 02:17 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  10. 2026-10-06 21:56 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  11. 2026-10-06 17:25 UTCEG score recompute
  12. 2026-10-06 17:25 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-10-06 13:16 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  15. 2026-10-06 09:07 UTCEG score recompute
  16. 2026-10-06 09:07 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  17. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  18. 2026-10-05 17:27 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  19. 2026-10-05 12:01 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  20. 2026-10-05 06:43 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  21. 2026-10-05 02:23 UTCEG score recompute
  22. 2026-10-05 02:23 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  23. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  24. 2026-10-04 21:54 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  25. 2026-10-04 16:27 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  26. 2026-10-04 11:52 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  27. 2026-10-04 07:31 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  28. 2026-10-04 03:23 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  29. 2026-10-03 19:27 UTCEG score recompute
  30. 2026-10-03 19:27 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  31. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  32. 2026-10-03 01:54 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  33. 2026-10-02 21:45 UTCEG score recompute
  34. 2026-10-02 21:45 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  35. 2026-10-02 15:49 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  36. 2026-10-02 07:01 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  37. 2026-10-02 01:58 UTCEG score recompute
  38. 2026-10-02 01:58 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  39. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  40. 2026-10-01 14:07 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  41. 2026-10-01 09:58 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  42. 2026-10-01 05:50 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  43. 2026-10-01 01:32 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  44. 2026-09-30 20:54 UTCEG score recompute
  45. 2026-09-30 20:54 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  46. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  47. 2026-09-29 06:42 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  48. 2026-09-29 02:34 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  49. 2026-09-28 22:03 UTCEG score recompute
  50. 2026-09-28 22:03 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  51. 2026-09-28 15:21 UTCEG score recompute
  52. 2026-09-28 15:21 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  53. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  54. 2026-09-28 11:01 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  55. 2026-09-28 06:52 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  56. 2026-09-28 02:43 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  57. 2026-09-27 22:30 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  58. 2026-09-27 16:42 UTCEG score recompute
  59. 2026-09-27 16:42 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  60. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  61. 2026-09-27 12:32 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  62. 2026-09-27 08:23 UTCEG score recompute
  63. 2026-09-27 08:23 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  64. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  65. 2026-09-25 11:52 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  66. 2026-09-25 06:31 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  67. 2026-09-25 02:23 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  68. 2026-09-24 17:16 UTCEG score recompute
  69. 2026-09-24 17:16 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  70. 2026-09-24 13:07 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  71. 2026-09-24 08:58 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  72. 2026-09-24 04:49 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  73. 2026-09-24 00:40 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0
  74. 2026-09-23 20:30 UTCEG score recompute
  75. 2026-09-23 20:30 UTCGHSA enrichmentGHSA-v3h3-59vx-wx73 · GitHub severity CRITICAL · GitHub CVSS 9.0

Frequently asked(5)

What is CVE-2026-73042?
CVE-2026-73042 is a critical-severity vulnerability; its CVE record was published on August 15, 2026. SiYuan before v3.7.4 fails to properly escape database menu metadata in HTML interpolation, allowing stored values to execute script when users open group, view, or field-edit menus. Attackers can inject markup through field descriptions or names that close containing elements and execute arbitrary…
When was CVE-2026-73042 made public?
CVE-2026-73042 was made public on August 1, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on August 15, 2026. EchelonGraph's copy of the record carries a last-modified date of August 26, 2026; the record at its source may have been updated since.
Is CVE-2026-73042 actively exploited?
CVE-2026-73042 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73042?
CVE-2026-73042 has a CVSS base score of 9.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73042?
No fix for CVE-2026-73042 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's CNA (VulnCheck) lists siyuan-note siyuan versions before 3.7.4 as affected, and siyuan-note siyuan versions 3.7.4 as unaffected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-73042 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-73042

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