CVE-2026-63259

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-07-22. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
4.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.3Exploit: NoneExposed: 0

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

Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to information disclosure via user-supplied identifiers that reference scheduled query result data from Kibana Spaces the requester is not authorized to access.

CVSS v3
4.3
EG Score
4.3(high)
EPSS
8.4%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Jul 22, 2026
No patch confirmed yet.
generic

Kibana 9.4.4 Security Update (ESA-2026-70) - Security Announcements - Discuss the Elastic Stack

https://discuss.elastic.co/t/kibana-9-4-4-security-update-esa-2026-70/388573

Vendor Advisories for CVE-2026-63259(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 12× in last 7d / 12× 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. 2026-07-22 22:14 UTCEG score recompute
  2. 2026-07-22 22:14 UTCGHSA enrichment
  3. 2026-07-22 15:06 UTCEG score recompute
  4. 2026-07-22 15:06 UTCGHSA enrichment
  5. 2026-07-22 14:08 UTCEPSS rescore
  6. 2026-07-22 14:08 UTCEPSS rescore
  7. 2026-07-22 14:04 UTCEG score recompute
  8. 2026-07-22 14:04 UTCGHSA enrichment
  9. 2026-07-22 01:44 UTCEG score recompute
  10. 2026-07-22 01:44 UTCGHSA enrichment
  11. 2026-07-21 22:46 UTCEG score recompute
  12. 2026-07-21 22:44 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-63259?
CVE-2026-63259 is a medium vulnerability published on July 21, 2026. Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to information disclosure via user-supplied identifiers that reference scheduled query result data from Kibana Spaces the requester is not authorized to access.
When was CVE-2026-63259 disclosed?
CVE-2026-63259 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63259 actively exploited?
CVE-2026-63259 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-63259?
CVE-2026-63259 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-63259?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63259, 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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