CVE-2026-59833

HIGHPre-NVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 56% 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
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.6Exploit: Elevated riskExposed: 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 3.7.1, SiYuan renders note and package content to HTML through the Lute engine with sanitization enabled, but Lute's dangerous javascript scheme block does not check form action or SVG xlink:href attributes, allowing stored cross-site scripting in document export-preview and Bazaar package README render paths that can execute OS commands in the Electron desktop renderer. This issue is fixed in versions 3.7.1.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
55(Track*)
EG Risk 55/100SSVC: 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
Severity86% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 10, 2026

Advisory Details (3)

Auto-updated Jul 9, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github.
github Patch Available🟡 PoC Available

Stored XSS to RCE in SiYuan via a per-attribute URL-scheme sanitizer gap in Lute (form action / SVG xlink:href) · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-97xv-3v84-h358
github_release Patch Available

Improve details

Patch available: siyuan-note/siyuan v3.7.1

https://github.com/siyuan-note/siyuan/releases/tag/v3.7.1
github_commit

commit ebe252e61fb9 (siyuan-note/siyuan)

Fix landed in siyuan-note/siyuan commit ebe252e61fb9 — awaiting tagged release

https://github.com/siyuan-note/siyuan/commit/ebe252e61fb93f258d083b9da0fa403679fdf94a

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 40× 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 117 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-59833?
CVE-2026-59833 is a high vulnerability published on July 9, 2026. SiYuan is an open-source personal knowledge management system. Prior to 3.7.1, SiYuan renders note and package content to HTML through the Lute engine with sanitization enabled, but Lute's dangerous javascript scheme block does not check form action or SVG xlink:href attributes, allowing stored…
When was CVE-2026-59833 disclosed?
CVE-2026-59833 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59833 actively exploited?
CVE-2026-59833 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.3% of all scored CVEs.
What is the CVSS score of CVE-2026-59833?
CVE-2026-59833 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-59833?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59833, 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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