CVE-2026-86283

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 86% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

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

MISP's UiBeta theme collection view (app/View/Themed/UiBeta/Collections/view.ctp) performed a secondary query of member events by UUID without applying the caller's access control list (ACL). The CollectionsController::view() action correctly resolved collection element UUIDs through Event::fetchSimpleEvents($user, ...), which enforces per-user event ACL. However, the view template independently re-queried the same UUIDs using only an Event.uuid IN (...) condition, omitting the createEventConditions() authorization filter. Because collection element UUIDs are stored without server-side authorization against the referenced event (CollectionElementsController::add() accepts whatever UUID the collection owner posts), an authenticated user with view access to a collection could retrieve full details of events they are not permitted to read. The exposed data included event identifiers, info, dates, timestamps, creator organization, all event tags, and galaxy clusters (the latter attached via a cluster-scoped rather than event-scoped ACL check). This constitutes an authorization bypass at the presentation layer, allowing horizontal privilege escalation across event boundaries within the MISP instance.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

September 6, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Sep 6, 2026
No patch confirmed yet.
generic
https://github.com/MISP/MISP/commit/44573e4a8.patch

Vendor Advisories for CVE-2026-86283(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 26× in last 7d / 58× 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 13:30 UTCGHSA enrichment
  3. 2026-09-20 01:47 UTCEG score recompute
  4. 2026-09-20 01:47 UTCGHSA enrichment
  5. 2026-09-19 14:03 UTCGHSA enrichment
  6. 2026-09-19 02:20 UTCEG score recompute
  7. 2026-09-19 02:19 UTCGHSA enrichment
  8. 2026-09-18 19:28 UTCEPSS rescore
  9. 2026-09-18 14:35 UTCGHSA enrichment
  10. 2026-09-18 02:51 UTCEG score recompute
  11. 2026-09-18 02:51 UTCGHSA enrichment
  12. 2026-09-17 19:32 UTCEPSS rescore
  13. 2026-09-17 15:07 UTCGHSA enrichment
  14. 2026-09-17 03:23 UTCGHSA enrichment
  15. 2026-09-16 15:39 UTCEG score recompute
  16. 2026-09-16 15:39 UTCGHSA enrichment
  17. 2026-09-16 14:09 UTCEPSS rescore
  18. 2026-09-16 05:15 UTCEPSS rescore
  19. 2026-09-16 03:55 UTCGHSA enrichment
  20. 2026-09-15 16:11 UTCGHSA enrichment
  21. 2026-09-15 04:27 UTCEG score recompute
  22. 2026-09-15 04:27 UTCGHSA enrichment
  23. 2026-09-15 03:12 UTCEPSS rescore
  24. 2026-09-15 03:12 UTCEPSS rescore
  25. 2026-09-14 16:43 UTCGHSA enrichment
Show 33 more
  1. 2026-09-14 04:59 UTCGHSA enrichment
  2. 2026-09-13 17:16 UTCEG score recompute
  3. 2026-09-13 17:16 UTCGHSA enrichment
  4. 2026-09-13 05:32 UTCGHSA enrichment
  5. 2026-09-12 17:48 UTCEG score recompute
  6. 2026-09-12 17:48 UTCGHSA enrichment
  7. 2026-09-12 06:04 UTCGHSA enrichment
  8. 2026-09-11 18:20 UTCEG score recompute
  9. 2026-09-11 18:20 UTCGHSA enrichment
  10. 2026-09-11 14:53 UTCEPSS rescore
  11. 2026-09-11 14:53 UTCEPSS rescore
  12. 2026-09-11 06:36 UTCGHSA enrichment
  13. 2026-09-10 18:52 UTCEG score recompute
  14. 2026-09-10 18:51 UTCGHSA enrichment
  15. 2026-09-10 07:05 UTCGHSA enrichment
  16. 2026-09-09 19:21 UTCGHSA enrichment
  17. 2026-09-09 07:37 UTCEG score recompute
  18. 2026-09-09 07:37 UTCGHSA enrichment
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-08 19:54 UTCEG score recompute
  21. 2026-09-08 19:54 UTCGHSA enrichment
  22. 2026-09-08 15:10 UTCGHSA enrichment
  23. 2026-09-08 09:57 UTCGHSA enrichment
  24. 2026-09-07 21:15 UTCEG score recompute
  25. 2026-09-07 21:14 UTCGHSA enrichment
  26. 2026-09-07 09:30 UTCEG score recompute
  27. 2026-09-07 09:30 UTCGHSA enrichment
  28. 2026-09-07 09:06 UTCEG score recompute
  29. 2026-09-07 09:06 UTCGHSA enrichment
  30. 2026-09-07 03:05 UTCGHSA enrichment
  31. 2026-09-06 15:22 UTCEG score recompute
  32. 2026-09-06 14:24 UTCEG score recompute
  33. 2026-09-06 14:24 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86283?
CVE-2026-86283 is a high vulnerability published on September 6, 2026. MISP's UiBeta theme collection view (app/View/Themed/UiBeta/Collections/view.ctp) performed a secondary query of member events by UUID without applying the caller's access control list (ACL). The CollectionsController::view() action correctly resolved collection element UUIDs through…
When was CVE-2026-86283 disclosed?
CVE-2026-86283 was first published in the National Vulnerability Database on September 6, 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-2026-86283 actively exploited?
CVE-2026-86283 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 85.6% of all scored CVEs.
What is the CVSS score of CVE-2026-86283?
CVE-2026-86283 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-86283?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86283, 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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