Is CVE-2026-7765 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-7765 being exploited in the wild.

How severe is CVE-2026-7765?

Informational severity, with a CVSS score of 6.3, published 8 June 2026.

Which products and versions are affected?

Checkmk GmbH Checkmk < 2.5.0p5.

Is there a fix for CVE-2026-7765?

A patch was published on 2026-04-30: Fix released in version 2.5.0p5 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-7765 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-7765?

Check whether anything you run is named in the advisory. 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.

CVE-2026-7765: Checkmk incorrect authorization in User Messages dashboard widget

Q: Is there a fix for CVE-2026-7765?

A patch was published on 2026-04-30: Fix released in version 2.5.0p5 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-7765 attacked?

It is attacked over the network, in a network appliance.

Q: Am I affected by CVE-2026-7765?

Check whether anything you run is named in the advisory. 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.

CVE-2026-7765 · Severity: info · CVSS 6.3 · Published 2026-06-08

Checkmk is an IT infrastructure monitoring platform. A security flaw in its dashboard sharing feature allows an unauthorized person to read the private system messages of the user who created the dashboard share. If an attacker obtains a valid public dashboard share link, they can access the creator's personal notifications and messages, potentially exposing sensitive operational information.

Quick answers

Is CVE-2026-7765 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-7765 being exploited in the wild.
How severe is CVE-2026-7765?: Informational severity, with a CVSS score of 6.3, published 8 June 2026.
Which products and versions are affected?: Checkmk GmbH Checkmk < 2.5.0p5.
Is there a fix for CVE-2026-7765?: A patch was published on 2026-04-30: Fix released in version 2.5.0p5 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-7765 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-7765?: Check whether anything you run is named in the advisory. 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

An incorrect authorization vulnerability (CWE-863) exists in the User Messages dashboard widget of Checkmk. The message-fetching endpoint (get_user_messages_token_auth.py) incorrectly returns messages belonging to the dashboard's creator (the token issuer) rather than the current viewer. An attacker who possesses a valid public dashboard share token can query this endpoint directly to retrieve the issuer's personal messages, even if the User Messages widget is not explicitly included on the shared dashboard. The issue is resolved in version 2.5.0p5 by removing the vulnerable endpoint and disabling the widget on shared dashboards.

Affected products

Checkmk GmbH Checkmk < 2.5.0p5

Timeline

2026-04-30: patched: Fix released in version 2.5.0p5
2026-06-08: disclosed: CVE published and NVD entry created

References

https://checkmk.com/werk/19815

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