CVE-2026-86191

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-05. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 0

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

SiYuan versions before v3.8.2 contain an information disclosure vulnerability in the getAttributeViewKeysByID endpoint that allows publish readers to enumerate private attribute view key definitions without verifying parent database visibility. Attackers can access the endpoint to retrieve complete key schemas including sensitive field names and relation definitions from hidden databases.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

September 5, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 5, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

SiYuan before v3.8.2 Private Attribute View Key Enumeration | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-3.8.2-private-attribute-view-key-enumeration
github Patch Available🟡 PoC Available

Reader Can Enumerate Private Attribute-View Key Definitions · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-j4qq-w6qx-6839

Vendor Advisories for CVE-2026-86191(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 21× in last 7d / 46× 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. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 08:54 UTCEG score recompute
  3. 2026-09-20 08:54 UTCGHSA enrichment
  4. 2026-09-19 09:55 UTCEG score recompute
  5. 2026-09-19 09:55 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 10:27 UTCEG score recompute
  8. 2026-09-18 10:27 UTCGHSA enrichment
  9. 2026-09-17 19:32 UTCEPSS rescore
  10. 2026-09-17 11:27 UTCEG score recompute
  11. 2026-09-17 11:27 UTCGHSA enrichment
  12. 2026-09-16 14:09 UTCEPSS rescore
  13. 2026-09-16 12:25 UTCEG score recompute
  14. 2026-09-16 12:25 UTCGHSA enrichment
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 13:25 UTCEG score recompute
  17. 2026-09-15 13:25 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-14 14:25 UTCEG score recompute
  21. 2026-09-14 14:25 UTCGHSA enrichment
  22. 2026-09-13 15:25 UTCGHSA enrichment
  23. 2026-09-12 16:25 UTCEG score recompute
  24. 2026-09-12 16:25 UTCGHSA enrichment
  25. 2026-09-11 17:25 UTCEG score recompute
Show 21 more
  1. 2026-09-11 17:25 UTCGHSA enrichment
  2. 2026-09-11 14:53 UTCEPSS rescore
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-10 18:16 UTCEG score recompute
  5. 2026-09-10 18:15 UTCGHSA enrichment
  6. 2026-09-09 19:14 UTCEG score recompute
  7. 2026-09-09 19:14 UTCGHSA enrichment
  8. 2026-09-08 22:01 UTCEPSS rescore
  9. 2026-09-08 20:14 UTCGHSA enrichment
  10. 2026-09-08 19:55 UTCEG score recompute
  11. 2026-09-08 19:55 UTCGHSA enrichment
  12. 2026-09-08 10:24 UTCEG score recompute
  13. 2026-09-08 10:24 UTCGHSA enrichment
  14. 2026-09-07 11:23 UTCEG score recompute
  15. 2026-09-07 11:23 UTCGHSA enrichment
  16. 2026-09-06 13:48 UTCEPSS rescore
  17. 2026-09-06 12:22 UTCEG score recompute
  18. 2026-09-06 12:22 UTCGHSA enrichment
  19. 2026-09-05 13:23 UTCEG score recompute
  20. 2026-09-05 12:34 UTCEG score recompute
  21. 2026-09-05 12:32 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86191?
CVE-2026-86191 is a medium vulnerability published on September 5, 2026. SiYuan versions before v3.8.2 contain an information disclosure vulnerability in the getAttributeViewKeysByID endpoint that allows publish readers to enumerate private attribute view key definitions without verifying parent database visibility. Attackers can access the endpoint to retrieve complete…
When was CVE-2026-86191 disclosed?
CVE-2026-86191 was first published in the National Vulnerability Database on September 5, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86191 actively exploited?
CVE-2026-86191 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 93.5% of all scored CVEs.
What is the CVSS score of CVE-2026-86191?
CVE-2026-86191 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-86191?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86191, 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-2026-86191

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