CVE-2026-85578

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-04. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

SiYuan through 3.8.1 contains an authorization bypass vulnerability in the /api/file/getFile endpoint that allows readers to retrieve files from notebooks explicitly configured as Visible:false. Attackers with reader role can access private workspace files including notebook metadata and internal configuration by knowing the hidden notebook identifier and file path.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

September 4, 2026

Last Modified

September 14, 2026

Advisory Details (2)

Auto-updated Sep 4, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

SiYuan through 3.8.1 Authorization Bypass via getFile | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-through-3.8.1-authorization-bypass-via-getfile
github Patch Available🟡 PoC Available

Reader can read files from an explicitly hidden notebook · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-8ggq-wq3f-vxrw

Vendor Advisories for CVE-2026-85578(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 20× in last 7d / 61× 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. 2026-09-25 03:13 UTCEG score recompute
  2. 2026-09-25 03:13 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 02:15 UTCEG score recompute
  5. 2026-09-24 02:15 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 01:16 UTCEG score recompute
  8. 2026-09-23 01:16 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-22 00:18 UTCEG score recompute
  11. 2026-09-22 00:18 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-20 23:20 UTCEG score recompute
  14. 2026-09-20 23:20 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-19 22:22 UTCEG score recompute
  17. 2026-09-19 22:22 UTCGHSA enrichment
  18. 2026-09-18 21:23 UTCEG score recompute
  19. 2026-09-18 21:23 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-17 20:24 UTCEG score recompute
  22. 2026-09-17 20:24 UTCGHSA enrichment
  23. 2026-09-17 19:32 UTCEPSS rescore
  24. 2026-09-16 18:28 UTCEG score recompute
  25. 2026-09-16 18:28 UTCGHSA enrichment
Show 36 more
  1. 2026-09-16 14:09 UTCEPSS rescore
  2. 2026-09-16 05:15 UTCEPSS rescore
  3. 2026-09-15 15:30 UTCEG score recompute
  4. 2026-09-15 15:30 UTCGHSA enrichment
  5. 2026-09-15 03:12 UTCEPSS rescore
  6. 2026-09-15 03:12 UTCEPSS rescore
  7. 2026-09-14 14:32 UTCEG score recompute
  8. 2026-09-14 14:32 UTCGHSA enrichment
  9. 2026-09-14 14:00 UTCEG score recompute
  10. 2026-09-14 14:00 UTCGHSA enrichment
  11. 2026-09-14 03:15 UTCEG score recompute
  12. 2026-09-14 03:15 UTCGHSA enrichment
  13. 2026-09-13 02:17 UTCEG score recompute
  14. 2026-09-13 02:17 UTCGHSA enrichment
  15. 2026-09-12 01:19 UTCEG score recompute
  16. 2026-09-12 01:19 UTCGHSA enrichment
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-11 14:53 UTCEPSS rescore
  19. 2026-09-11 00:21 UTCEG score recompute
  20. 2026-09-11 00:21 UTCGHSA enrichment
  21. 2026-09-09 23:23 UTCEG score recompute
  22. 2026-09-09 23:23 UTCGHSA enrichment
  23. 2026-09-08 22:01 UTCEPSS rescore
  24. 2026-09-08 20:19 UTCGHSA enrichment
  25. 2026-09-08 16:23 UTCEG score recompute
  26. 2026-09-08 16:22 UTCGHSA enrichment
  27. 2026-09-07 15:15 UTCGHSA enrichment
  28. 2026-09-06 14:17 UTCEG score recompute
  29. 2026-09-06 14:17 UTCGHSA enrichment
  30. 2026-09-06 13:48 UTCEPSS rescore
  31. 2026-09-05 15:31 UTCEPSS rescore
  32. 2026-09-05 13:19 UTCEG score recompute
  33. 2026-09-05 13:19 UTCGHSA enrichment
  34. 2026-09-04 12:22 UTCEG score recompute
  35. 2026-09-04 11:34 UTCEG score recompute
  36. 2026-09-04 11:33 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-85578?
CVE-2026-85578 is a medium vulnerability published on September 4, 2026. SiYuan through 3.8.1 contains an authorization bypass vulnerability in the /api/file/getFile endpoint that allows readers to retrieve files from notebooks explicitly configured as Visible:false. Attackers with reader role can access private workspace files including notebook metadata and internal…
When was CVE-2026-85578 disclosed?
CVE-2026-85578 was first published in the National Vulnerability Database on September 4, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85578 actively exploited?
CVE-2026-85578 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 71.3% of all scored CVEs.
What is the CVSS score of CVE-2026-85578?
CVE-2026-85578 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-85578?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85578, 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

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