CVE-2026-72680: Kibana Agent Builder A2A JSON-RPC API endpoint derives the identifier of a stored conversation from a user-sup

Routine

MEDIUM 6.5UPGRADE

CVE-2026-72680 is a medium-severity flaw (CVSS 6.5) affecting kibana. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Kibana Agent Builder A2A JSON-RPC API endpoint derives the identifier of a stored conversation from a user-supplied input, and the ownership check on that identifier does not distinguish between a conversation that does not exist and one that exists but belongs to another user. As a result, an authenticated user holding only the Agent Builder read privilege can supply an identifier already in use by another user in the same space and cause that u

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-639
Published	2026-08-13
Last modified	2026-09-03

Publisher (CNA): Elastic · Vendor: elastic

Last updated 2026-09-03 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-13 20:17 UTCPublished CVE record published
2026-09-03 18:59 UTCUpdated Record last modified

elastic kibana UPGRADE

Affected: >= 9.2.0 and < 9.4.5

Fixed in: 9.4.5

Safe to downgrade to: a release before 9.2.0

1. Check installed version

apt-cache policy kibana || rpm -q kibana || kibana --version

2. UPGRADE to 9.4.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade kibana

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kibana

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 9.2.0 (Debian / Ubuntu)

apt-cache madison kibana sudo apt install kibana=<VERSION_BEFORE_9.2.0> sudo apt-mark hold kibana

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list kibana sudo dnf downgrade kibana-<VERSION_BEFORE_9.2.0> sudo dnf versionlock add kibana

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-72680?

kibana: upgrade to 9.4.5. Exact commands for each OS are on this page.

Is CVE-2026-72680 being exploited?

CVE-2026-72680 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-72680 affect?

CVE-2026-72680 affects kibana. Severity is medium (CVSS 6.5). Kibana Agent Builder A2A JSON-RPC API endpoint derives the identifier of a stored conversation from a user-supplied input, and the ownership check on that identifier does not distinguish between a conversation that does not exist and one th

How urgent is CVE-2026-72680?

Priority 28/100. No elevated risk signals yet.

Software pages

Kibana vulnerabilities

Related CVEs

CVE-2026-49091 HIGH 8.0 UPGRADE Improper Output Neutralization for Logs (CWE-117) in Kibana can lead to log injection via Log Injection-Tamper
CVE-2026-49087 MEDIUM 6.5 UPGRADE Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via E
CVE-2026-56151 MEDIUM 6.5 UPGRADE Improper Input Validation (CWE-20) in Kibana can lead to a denial of service via Input Data Manipulation (CAPE
CVE-2026-49088 MEDIUM 4.4 UPGRADE Insertion of Sensitive Information into Log File (CWE-532) in Kibana can lead to information disclosure
CVE-2026-63139 MEDIUM 6.5 UPGRADE Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (

References

← Back to latest CVEs