CVE-2026-82653

HIGHPre-NVD 8.98.9—
EchelonGraph scoreHIGH confidence

Score 8.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-30. a secondary CVSS source baseline 8.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.9Exploit: Elevated riskExposed: 0

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

SiYuan before v3.8.1 contains a stored cross-site scripting vulnerability in confirmDialog() where unescaped package names and notebook names are interpolated directly into innerHTML assignments. Attackers can submit malicious bazaar packages with HTML/script payloads in the name field that execute in users' browsers when uninstalling packages or unlocking encrypted notebooks.

CVSS v3
8.9
EG Score
8.9(high)
EG Risk
56(Track*)
EG Risk 56/100SSVC: 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
Severity89% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

August 30, 2026

Last Modified

September 2, 2026

Advisory Details (2)

Auto-updated Aug 30, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

SiYuan before v3.8.1 Stored XSS via confirmDialog | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-3.8.1-stored-xss-via-confirmdialog
github Patch Available🟡 PoC Available

Stored HTML/script injection via unescaped confirmDialog() content in bazaar package name handling · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hvwp-43j9-4xgf

Vendor Advisories for CVE-2026-82653(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 28× in last 7d / 105× 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 105 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-82653?
CVE-2026-82653 is a high vulnerability published on August 30, 2026. SiYuan before v3.8.1 contains a stored cross-site scripting vulnerability in confirmDialog() where unescaped package names and notebook names are interpolated directly into innerHTML assignments. Attackers can submit malicious bazaar packages with HTML/script payloads in the name field that execute…
When was CVE-2026-82653 disclosed?
CVE-2026-82653 was first published in the National Vulnerability Database on August 30, 2026, with the most recent update on September 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82653 actively exploited?
CVE-2026-82653 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 72.3% of all scored CVEs.
What is the CVSS score of CVE-2026-82653?
CVE-2026-82653 has a CVSS v3 base score of 8.9 (NVD).
How do I remediate CVE-2026-82653?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82653, 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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