CVE-2026-85579

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-04. 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 is affected by an information disclosure vulnerability (confirmed in v3.8.1, fixed in v3.8.2) in the reader-accessible POST /api/transactions/undoState endpoint. The endpoint returns the peekMutatedRootIDs list from the global undo-log stack for a caller-supplied root ID without applying publish-access visibility filtering. An authenticated reader who knows the root ID of a visible document can obtain the internal root IDs of other documents (including private or unpublished ones) modified in the same cross-document transaction, disclosing internal identifiers and cross-document relationships. Document body contents are not directly exposed.

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
11%
KEV
Not listed

Published

September 4, 2026

Last Modified

September 8, 2026

Advisory Details (2)

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

SiYuan before v3.8.2 Information Disclosure via undoState | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-3.8.2-information-disclosure-via-undostate
github Patch Available🟡 PoC Available

Reader-role undoState discloses private related document root IDs · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-6gf8-q9ch-w732

Vendor Advisories for CVE-2026-85579(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 19× in last 7d / 48× 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 15:20 UTCEG score recompute
  3. 2026-09-20 15:19 UTCGHSA enrichment
  4. 2026-09-19 13:44 UTCEG score recompute
  5. 2026-09-19 13:44 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 12:10 UTCEG score recompute
  8. 2026-09-18 12:10 UTCGHSA enrichment
  9. 2026-09-17 19:32 UTCEPSS rescore
  10. 2026-09-17 10:36 UTCEG score recompute
  11. 2026-09-17 10:36 UTCGHSA enrichment
  12. 2026-09-16 14:09 UTCEPSS rescore
  13. 2026-09-16 09:02 UTCEG score recompute
  14. 2026-09-16 09:02 UTCGHSA enrichment
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-15 07:09 UTCEG score recompute
  17. 2026-09-15 07:09 UTCGHSA enrichment
  18. 2026-09-15 03:12 UTCEPSS rescore
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-14 05:36 UTCEG score recompute
  21. 2026-09-14 05:36 UTCGHSA enrichment
  22. 2026-09-13 04:03 UTCEG score recompute
  23. 2026-09-13 04:03 UTCGHSA enrichment
  24. 2026-09-12 02:29 UTCEG score recompute
  25. 2026-09-12 02:29 UTCGHSA enrichment
Show 23 more
  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 14:53 UTCEPSS rescore
  3. 2026-09-11 00:56 UTCEG score recompute
  4. 2026-09-11 00:56 UTCGHSA enrichment
  5. 2026-09-09 23:23 UTCEG score recompute
  6. 2026-09-09 23:23 UTCGHSA enrichment
  7. 2026-09-08 22:01 UTCEPSS rescore
  8. 2026-09-08 20:19 UTCGHSA enrichment
  9. 2026-09-08 16:09 UTCEG score recompute
  10. 2026-09-08 16:09 UTCGHSA enrichment
  11. 2026-09-08 15:16 UTCEG score recompute
  12. 2026-09-08 15:16 UTCGHSA enrichment
  13. 2026-09-07 17:04 UTCEG score recompute
  14. 2026-09-07 17:04 UTCGHSA enrichment
  15. 2026-09-06 15:31 UTCEG score recompute
  16. 2026-09-06 15:31 UTCGHSA enrichment
  17. 2026-09-06 13:48 UTCEPSS rescore
  18. 2026-09-05 15:31 UTCEPSS rescore
  19. 2026-09-05 13:57 UTCEG score recompute
  20. 2026-09-05 13:57 UTCGHSA enrichment
  21. 2026-09-04 12:22 UTCEG score recompute
  22. 2026-09-04 11:34 UTCEG score recompute
  23. 2026-09-04 11:33 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-85579?
CVE-2026-85579 is a medium vulnerability published on September 4, 2026. SiYuan is affected by an information disclosure vulnerability (confirmed in v3.8.1, fixed in v3.8.2) in the reader-accessible POST /api/transactions/undoState endpoint. The endpoint returns the peekMutatedRootIDs list from the global undo-log stack for a caller-supplied root ID without applying…
When was CVE-2026-85579 disclosed?
CVE-2026-85579 was first published in the National Vulnerability Database on September 4, 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-2026-85579 actively exploited?
CVE-2026-85579 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 89.2% of all scored CVEs.
What is the CVSS score of CVE-2026-85579?
CVE-2026-85579 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-85579?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85579, 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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