CVE-2026-87807

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-09. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 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 authenticated SQL injection vulnerability in the fullTextSearchBlock endpoint's method=1 query parameter. Attackers can inject UNION SELECT statements to read the entire blocks table, bypassing publish-access controls and exposing all document content and sensitive attributes.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Sep 9, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

siyuan before v3.8.2 SQL Injection via fullTextSearchBlock | Advisories | VulnCheck

https://www.vulncheck.com/advisories/siyuan-before-3.8.2-sql-injection-via-fulltextsearchblock
github Patch Available🟡 PoC Available

Authenticated SQL Injection in full-text search (`method=1` query syntax) · Advisory · siyuan-note/siyuan · GitHub

https://github.com/siyuan-note/siyuan/security/advisories/GHSA-336w-67gx-gx2h

Vendor Advisories for CVE-2026-87807(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 26× in last 7d / 64× 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 00:33 UTCEG score recompute
  2. 2026-09-25 00:33 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 12:18 UTCGHSA enrichment
  5. 2026-09-24 00:03 UTCEG score recompute
  6. 2026-09-24 00:03 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 11:49 UTCGHSA enrichment
  9. 2026-09-22 23:35 UTCEG score recompute
  10. 2026-09-22 23:35 UTCGHSA enrichment
  11. 2026-09-22 16:01 UTCEPSS rescore
  12. 2026-09-22 11:12 UTCGHSA enrichment
  13. 2026-09-21 22:58 UTCEG score recompute
  14. 2026-09-21 22:58 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 10:44 UTCGHSA enrichment
  17. 2026-09-20 22:29 UTCEG score recompute
  18. 2026-09-20 22:29 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-20 10:15 UTCGHSA enrichment
  21. 2026-09-19 22:00 UTCEG score recompute
  22. 2026-09-19 22:00 UTCGHSA enrichment
  23. 2026-09-19 09:45 UTCGHSA enrichment
  24. 2026-09-18 21:20 UTCEG score recompute
  25. 2026-09-18 21:20 UTCGHSA enrichment
Show 39 more
  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 08:28 UTCGHSA enrichment
  3. 2026-09-17 20:14 UTCEG score recompute
  4. 2026-09-17 20:14 UTCGHSA enrichment
  5. 2026-09-17 19:32 UTCEPSS rescore
  6. 2026-09-17 07:00 UTCGHSA enrichment
  7. 2026-09-16 18:45 UTCEG score recompute
  8. 2026-09-16 18:45 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-16 06:30 UTCEG score recompute
  11. 2026-09-16 06:30 UTCGHSA enrichment
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 18:16 UTCGHSA enrichment
  14. 2026-09-15 05:33 UTCEG score recompute
  15. 2026-09-15 05:32 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 17:16 UTCGHSA enrichment
  18. 2026-09-14 05:02 UTCGHSA enrichment
  19. 2026-09-13 16:48 UTCEG score recompute
  20. 2026-09-13 16:48 UTCGHSA enrichment
  21. 2026-09-13 04:34 UTCGHSA enrichment
  22. 2026-09-12 16:19 UTCEG score recompute
  23. 2026-09-12 16:19 UTCGHSA enrichment
  24. 2026-09-12 04:05 UTCGHSA enrichment
  25. 2026-09-11 15:51 UTCEG score recompute
  26. 2026-09-11 15:51 UTCGHSA enrichment
  27. 2026-09-11 14:53 UTCEPSS rescore
  28. 2026-09-11 14:53 UTCEPSS rescore
  29. 2026-09-11 03:36 UTCGHSA enrichment
  30. 2026-09-10 15:22 UTCEG score recompute
  31. 2026-09-10 15:22 UTCGHSA enrichment
  32. 2026-09-10 15:00 UTCEG score recompute
  33. 2026-09-10 15:00 UTCGHSA enrichment
  34. 2026-09-10 09:02 UTCGHSA enrichment
  35. 2026-09-09 20:45 UTCEG score recompute
  36. 2026-09-09 20:45 UTCGHSA enrichment
  37. 2026-09-09 12:25 UTCEG score recompute
  38. 2026-09-09 11:30 UTCEG score recompute
  39. 2026-09-09 11:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-87807?
CVE-2026-87807 is a high vulnerability published on September 9, 2026. siyuan versions before v3.8.2 contain an authenticated SQL injection vulnerability in the fullTextSearchBlock endpoint's method=1 query parameter. Attackers can inject UNION SELECT statements to read the entire blocks table, bypassing publish-access controls and exposing all document content and…
When was CVE-2026-87807 disclosed?
CVE-2026-87807 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-87807 actively exploited?
CVE-2026-87807 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 63.5% of all scored CVEs.
What is the CVSS score of CVE-2026-87807?
CVE-2026-87807 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-87807?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-87807, 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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