CVE-2026-73054

HIGHPre-NVD 7.57.5
EchelonGraph scoreHIGH confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-10-23. A secondary CVSS source baseline 7.5; 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 weekElevated

Also known asEUVD-2026-59803 (ENISA EUVD) · GHSA-c8w8-3pqp-wr83 (GitHub Security Advisories) · GHSA-hg5w-8ppq-wpjq (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fixed version is listed under Patch Availability — apply it.

SiYuan versions before v3.7.4 contain an authentication bypass vulnerability in the WebSocket endpoint caused by differential parsing of query parameters between authentication exemption and session quarantine checks. Unauthenticated attackers can craft a malicious WebSocket URI with duplicated query parameters to bypass access auth code validation and receive the live kernel event stream including document identifiers, titles, and operation logs.

CVSS v3
7.5
EG Score
7.5HIGHhigh confidence
EG Risk
65
EG Risk 65/100

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)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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: A fixed version is listed under Patch Availability. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
35th
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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). 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; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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

A fixed version is listed under Patch Availability. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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
Fixed version listed under Patch Availability. Sources: github.
Web page

SiYuan before v3.7.4 Authentication Bypass via WebSocket | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-authentication-bypass-via-websocket
GitHub advisoryMentions a patch (unverified)

A parser differential between the WebSocket keepalive exemption and the session quarantine allows unauthenticated access to the broadcast event stream, defeating the fix for GHSA-xp2m-98x8-rpj6 · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-c8w8-3pqp-wr83

Vendor Advisories for CVE-2026-73054(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
gogithub.com/siyuan-note/siyuan/kernel @ 0.0.0-20260731131820-67bc300b6ea6 (fixes < 0.0.0-20260731131820-67bc300b6ea6)—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 54× 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 234 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 134 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-11-01 07:39 UTCGHSA enrichmentGHSA-c8w8-3pqp-wr83 · GitHub severity HIGH · GitHub CVSS 7.5
  3. 2026-11-01 07:39 UTCEG score recompute
  4. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  6. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  7. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  8. 2026-10-27 21:24 UTCEG score recompute
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  10. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  11. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  12. 2026-10-25 14:06 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  15. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  16. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  17. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  18. 2026-10-20 11:12 UTCEG score recompute
  19. 2026-10-20 11:12 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  21. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  22. 2026-10-18 03:15 UTCEG score recompute
  23. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  24. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  25. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
Show 75 more
  1. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  2. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  3. 2026-10-13 08:00 UTCEG score recompute
  4. 2026-10-13 08:00 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  5. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  6. 2026-10-12 15:41 UTCEG score recompute
  7. 2026-10-11 19:26 UTCEG score recompute
  8. 2026-10-11 16:42 UTCEG score recompute
  9. 2026-10-11 14:02 UTCEG score recompute
  10. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  13. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  15. 2026-10-06 21:55 UTCEG score recompute
  16. 2026-10-06 21:55 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  17. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-10-06 09:07 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-10-05 20:42 UTCEG score recompute
  20. 2026-10-05 20:42 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  21. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-10-05 09:39 UTCEG score recompute
  23. 2026-10-05 09:38 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  24. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-10-04 21:54 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  26. 2026-10-04 06:32 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  27. 2026-10-03 19:27 UTCEG score recompute
  28. 2026-10-03 19:27 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  29. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  30. 2026-10-03 03:04 UTCEG score recompute
  31. 2026-10-03 03:04 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  32. 2026-10-02 15:49 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  33. 2026-10-02 01:58 UTCEG score recompute
  34. 2026-10-02 01:58 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  35. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  36. 2026-10-01 08:00 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  37. 2026-09-30 20:54 UTCEG score recompute
  38. 2026-09-30 20:54 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  39. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  40. 2026-09-28 22:02 UTCEG score recompute
  41. 2026-09-28 22:02 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  42. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  43. 2026-09-28 06:35 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  44. 2026-09-27 19:32 UTCEG score recompute
  45. 2026-09-27 19:32 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  46. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  47. 2026-09-27 08:23 UTCEG score recompute
  48. 2026-09-27 08:23 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  49. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  50. 2026-09-25 02:22 UTCEG score recompute
  51. 2026-09-25 02:22 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  52. 2026-09-24 08:00 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  53. 2026-09-23 20:30 UTCEG score recompute
  54. 2026-09-23 20:30 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  55. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  56. 2026-09-23 07:48 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  57. 2026-09-22 20:45 UTCEG score recompute
  58. 2026-09-22 20:45 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  59. 2026-09-22 07:12 UTCEG score recompute
  60. 2026-09-22 07:12 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  61. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  62. 2026-09-21 20:09 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  63. 2026-09-21 09:05 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  64. 2026-09-20 21:11 UTCEG score recompute
  65. 2026-09-20 21:11 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  66. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  67. 2026-09-20 09:58 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  68. 2026-09-19 22:55 UTCEG score recompute
  69. 2026-09-19 22:54 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  70. 2026-09-19 11:00 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  71. 2026-09-18 21:57 UTCEG score recompute
  72. 2026-09-18 21:57 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  73. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  74. 2026-09-18 09:08 UTCGHSA enrichmentGHSA-hg5w-8ppq-wpjq · GitHub severity HIGH · GitHub CVSS 7.5
  75. 2026-09-17 22:04 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-73054?
CVE-2026-73054 is a high-severity vulnerability; its CVE record was published on August 15, 2026. SiYuan versions before v3.7.4 contain an authentication bypass vulnerability in the WebSocket endpoint caused by differential parsing of query parameters between authentication exemption and session quarantine checks. Unauthenticated attackers can craft a malicious WebSocket URI with duplicated…
When was CVE-2026-73054 made public?
CVE-2026-73054 was made public on July 31, 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-2026-73054 actively exploited?
CVE-2026-73054 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73054?
CVE-2026-73054 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73054?
A fixed version for CVE-2026-73054 is listed under Patch Availability on this page: update to the version listed for your package. The vendor advisories EchelonGraph has for CVE-2026-73054 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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