CVE-2026-54069

CRITICALPre-NVD 9.29.2—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6%, top 55% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
9.2
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.2Exploit: NoneExposed: 0

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

SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, SiYuan Note's kernel HTTP server unconditionally trusts all chrome-extension:// origins, granting RoleAdministrator access to every installed browser extension without any authentication. Combined with the default empty AccessAuthCode on desktop installs, any Chrome/Chromium extension -- including a compromised legitimate extension via supply chain attack -- can make fully authenticated admin API calls to the SiYuan kernel at 127.0.0.1:6806, enabling data exfiltration, stored XSS injection, and configuration tampering. This vulnerability is fixed in 3.7.0.

CVSS v3
9.2
EG Score
9.2(medium)
EPSS
44.9%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 25, 2026

Advisory Details (1)

Auto-updated Jun 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Unauthenticated Admin API Access via Blanket chrome-extension:// Origin Allowlist · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hvr9-72v2-fff3

Vendor Advisories for CVE-2026-54069(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 51× in last 7d / 122× 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.

Showing the most recent 100 of 122 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2026/CVE-2026-54069.yaml
    First seen Jan 1, 2026

    SiYuan Note <= 3.6.5 - Authentication Bypass

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54069?
CVE-2026-54069 is a critical vulnerability published on June 24, 2026. SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, SiYuan Note's kernel HTTP server unconditionally trusts all chrome-extension:// origins, granting RoleAdministrator access to every installed browser extension without any authentication. Combined with the default empty…
When was CVE-2026-54069 disclosed?
CVE-2026-54069 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on June 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54069 actively exploited?
CVE-2026-54069 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 44.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-54069?
CVE-2026-54069 has a CVSS v3 base score of 9.2 (NVD).
How do I remediate CVE-2026-54069?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54069, 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

Explore the affected products and dependency analysis for CVE-2026-54069

Explore →

Is Your Infrastructure Affected by CVE-2026-54069?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs