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CVE-2026-72915

7.5 · HIGH

Mastodon is a free, open-source social network server based on ActivityPub.

Published Aug 10, 2026CWE-200EPSS 0.48%

Overview

CVE-2026-72915 is a high-severity vulnerability. It was published on August 10, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Mastodon is a free, open-source social network server based on ActivityPub. From 4.6.0-beta.1 until 4.6.4 and 4.7.0-beta.1, any logged-in local user could use the show action in app/controllers/admin/collections_controller.rb to access personally identifying information about another local user in a collection because the controller used the general collection policy instead of the admin collection policy namespace. The exposed data included the other user's current email address and last-used IP address. This issue is fixed in versions 4.6.4 and 4.7.0-beta.1.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/mastodon/mastodon/commit/467c933459c7d0e5513475b9e4888afaedfb1074GitHubgithub.com/mastodon/mastodon/commit/930aa9fee26bf9eaefe27826fa1061288d83373bGitHubgithub.com/mastodon/mastodon/releases/tag/v4.6.4GitHubgithub.com/mastodon/mastodon/releases/tag/v4.7.0-beta.1GitHubgithub.com/mastodon/mastodon/security/advisories/GHSA-hx34-2pfw-2qfj

How CyberStrike helps

Frequently asked questions

What is CVE-2026-72915?

CVE-2026-72915 is a high-severity vulnerability. It was published on August 10, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-72915?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-72915?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-72915?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-72915 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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