# CVE-2026-63259 — Elastic Kibana

> As of 2026-07-22, CVE-2026-63259 is a MEDIUM-severity vulnerability in Elastic Kibana, CVSS v3.1 4.3, EPSS 0.1% (8.4th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-63259 as of 2026-07-22; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-07-22

## What is CVE-2026-63259?

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.

The record classifies CVE-2026-63259 under weakness class [CWE-639](https://intel.threadlinqs.com/cwe/CWE-639). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 76 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 4.3 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N`)
- **EPSS (FIRST):** 0.1% probability of exploitation in the next 30 days, higher than 8.4% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-21, last modified 2026-07-22

## Is CVE-2026-63259 being exploited?

It currently carries a trending score of 32 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Elastic](https://intel.threadlinqs.com/vendors/elastic): Kibana

## How to fix CVE-2026-63259

No vendor patch reference has been recorded for CVE-2026-63259 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-63259

No threat campaign in the Threadlinqs corpus currently references CVE-2026-63259, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, GitHub Security Advisories, FIRST EPSS. Last verified by Threadlinqs on 2026-07-22. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

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

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-63259
Full detection coverage and IOCs for threats exploiting CVE-2026-63259 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp