CVE-2026-54759

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 82% 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
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.7Exploit: 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, Lute's HTML sanitizer does not remove elements. Combined with the SiYuan Electron client's permissive security configuration, an attacker can include a malicious in a Bazaar package README that executes arbitrary commands on the victim's machine when the package details are viewed. No package installation is required. This vulnerability is fixed in 3.7.0.

CVSS v3
8.7
EG Score
8.7(medium)
EPSS
17.7%
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

Lute HTML sanitizer allows `<iframe>` tags in Bazaar package README, leading to arbitrary command execution via SiYuan Electron client · Advisory · siyuan-note/siyuan · GitHub

Affected: v3.6.4). This advisory describes a separate vulnerability that persists in

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-r6v5-4c66-f6pw

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 76× 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. 2026-07-16 00:12 UTCEG score recompute
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 16:57 UTCEPSS rescore
  4. 2026-07-15 11:58 UTCEG score recompute
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-14 23:08 UTCEG score recompute
  8. 2026-07-14 10:50 UTCEG score recompute
  9. 2026-07-13 22:34 UTCEG score recompute
  10. 2026-07-13 22:31 UTCEPSS rescore
  11. 2026-07-13 10:18 UTCEG score recompute
  12. 2026-07-13 06:13 UTCEPSS rescore
  13. 2026-07-13 06:13 UTCEPSS rescore
  14. 2026-07-12 22:03 UTCEG score recompute
  15. 2026-07-12 09:49 UTCEG score recompute
  16. 2026-07-12 05:46 UTCEPSS rescore
  17. 2026-07-11 21:35 UTCEG score recompute
  18. 2026-07-11 09:21 UTCEG score recompute
  19. 2026-07-11 08:27 UTCEPSS rescore
  20. 2026-07-11 08:27 UTCEPSS rescore
  21. 2026-07-10 21:07 UTCEG score recompute
  22. 2026-07-10 08:53 UTCEG score recompute
  23. 2026-07-09 20:33 UTCEG score recompute
  24. 2026-07-09 19:10 UTCEPSS rescore
  25. 2026-07-09 19:10 UTCEPSS rescore
Show 51 more
  1. 2026-07-09 08:18 UTCEG score recompute
  2. 2026-07-08 20:04 UTCEG score recompute
  3. 2026-07-08 15:16 UTCEPSS rescore
  4. 2026-07-08 15:16 UTCEPSS rescore
  5. 2026-07-08 07:49 UTCEG score recompute
  6. 2026-07-07 19:35 UTCEG score recompute
  7. 2026-07-07 13:46 UTCEPSS rescore
  8. 2026-07-07 13:46 UTCEPSS rescore
  9. 2026-07-07 06:53 UTCEG score recompute
  10. 2026-07-06 18:19 UTCEG score recompute
  11. 2026-07-06 16:27 UTCEPSS rescore
  12. 2026-07-06 16:27 UTCEPSS rescore
  13. 2026-07-06 05:45 UTCEG score recompute
  14. 2026-07-06 02:23 UTCEPSS rescore
  15. 2026-07-06 02:23 UTCEPSS rescore
  16. 2026-07-05 17:30 UTCEG score recompute
  17. 2026-07-05 05:16 UTCEG score recompute
  18. 2026-07-05 02:31 UTCEPSS rescore
  19. 2026-07-05 02:30 UTCEPSS rescore
  20. 2026-07-04 16:51 UTCEG score recompute
  21. 2026-07-04 06:31 UTCEPSS rescore
  22. 2026-07-04 06:31 UTCEPSS rescore
  23. 2026-07-04 04:23 UTCEG score recompute
  24. 2026-07-03 16:06 UTCEG score recompute
  25. 2026-07-03 03:51 UTCEG score recompute
  26. 2026-07-02 15:37 UTCEG score recompute
  27. 2026-07-02 03:23 UTCEG score recompute
  28. 2026-07-01 15:09 UTCEG score recompute
  29. 2026-07-01 15:07 UTCEPSS rescore
  30. 2026-07-01 02:55 UTCEG score recompute
  31. 2026-06-30 23:22 UTCEPSS rescore
  32. 2026-06-30 14:41 UTCEG score recompute
  33. 2026-06-30 02:27 UTCEG score recompute
  34. 2026-06-29 14:13 UTCEG score recompute
  35. 2026-06-29 14:06 UTCEPSS rescore
  36. 2026-06-29 14:06 UTCEPSS rescore
  37. 2026-06-29 01:57 UTCEG score recompute
  38. 2026-06-28 14:07 UTCEPSS rescore
  39. 2026-06-28 13:43 UTCEG score recompute
  40. 2026-06-28 04:56 UTCEPSS rescore
  41. 2026-06-28 04:56 UTCEPSS rescore
  42. 2026-06-28 01:30 UTCEG score recompute
  43. 2026-06-27 13:16 UTCEG score recompute
  44. 2026-06-27 03:08 UTCEPSS rescore
  45. 2026-06-27 01:03 UTCEG score recompute
  46. 2026-06-26 12:49 UTCEG score recompute
  47. 2026-06-26 00:34 UTCEG score recompute
  48. 2026-06-25 13:49 UTCEPSS rescore
  49. 2026-06-25 12:18 UTCEG score recompute
  50. 2026-06-25 00:04 UTCEG score recompute
  51. 2026-06-25 00:03 UTCNVD updatefirst tracked

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Frequently asked(5)

What is CVE-2026-54759?
CVE-2026-54759 is a high vulnerability published on June 24, 2026. SiYuan is an open-source personal knowledge management system. Prior to 3.7.0, Lute's HTML sanitizer does not remove <iframe> elements. Combined with the SiYuan Electron client's permissive security configuration, an attacker can include a malicious <iframe> in a Bazaar package README that executes…
When was CVE-2026-54759 disclosed?
CVE-2026-54759 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-2026-54759 actively exploited?
CVE-2026-54759 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-54759?
CVE-2026-54759 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-54759?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54759, 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.

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