CVE-2026-72643 Incorrect Authorization in Kibana Agent Builder Leading to Disclosure and Tampering of Private Agents
Attackers can view or modify private agents belonging to other users due to flawed username-based ownership checks in Kibana Agent Builder.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72643?
CVE-2026-72643 is a high-severity missing authorization vulnerability in Elastic Kibana, published on 13 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Kibana Agent Builder determines whether a caller owns a private agent by comparing a stable user identifier when one is recorded, and falling back to a comparison of the username when it is not. A username is not unique across Elasticsearch authentication realms, so two distinct principals that share a username in different realms are treated as the same owner. This discloses the configuration and instructions of an agent the caller does not own, and allows that agent to be altered or removed.
Weakness: CWE-863
Which versions are affected by CVE-2026-72643?
2 open source packages ship an affected version, including kibana and elk. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
kibana Bitnami | From 9.4.0 | 9.4.5, 9.5.1 |
elk Bitnami | From 9.4.0 | 9.4.5, 9.5.1 |
Products include Elastic Kibana.
How do I fix CVE-2026-72643?
Upgrade kibana to a fixed version for your release line: 9.4.5 or 9.5.1.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-72643 being exploited?
There is no known exploitation of CVE-2026-72643 in the wild and no public exploit code.
Other vulnerabilities in Elastic Kibana
Sources
Also known as BIT-elk-2026-72643, BIT-kibana-2026-72643, GHSA-m5pm-2p35-xvpr, MINI-4m32-f72j-7cf2, MINI-xg36-9g9f-r52q.