Quick answers
- Is CVE-2026-78596 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-78596 being exploited in the wild.
- How severe is CVE-2026-78596?
- Medium severity, with a CVSS score of 4.3, published 3 September 2026.
- Which products and versions are affected?
- Elastic Kibana 8.18.3 through 8.19.20, 9.0.3 through 9.4.5, 9.5.0 through 9.5.2.
- Is there a fix for CVE-2026-78596?
- A patch was published on 2026-09-03: Fixed in versions 8.19.21, 9.4.6, 9.5.3 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-78596 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-78596?
- Check whether you run Elastic Kibana at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
This vulnerability is a missing authorization check (CWE-862) in Kibana's Entity Analytics migration operations. An authenticated user holding Security read-level access in a single Kibana space can trigger migration operations that should require elevated privileges, but instead perform privileged writes across all spaces without proper authorization validation. The attack is network-accessible and requires only valid authentication credentials with limited scope; no user interaction is required. An attacker can modify data and configurations across multi-space deployments, bypassing intended access controls. The vulnerability has been patched in Kibana versions 8.19.21, 9.4.6, and 9.5.3, with no workarounds available for unpatched systems.
Affected products
- Elastic Kibana 8.18.3 through 8.19.20, 9.0.3 through 9.4.5, 9.5.0 through 9.5.2
Timeline
- 2026-09-03: disclosed: Security advisory ESA-2026-154 published
- 2026-09-03: patched: Fixed in versions 8.19.21, 9.4.6, 9.5.3