CVE-2026-72915Network attack vectorHinoki check available

Authenticated PII disclosure via wrong policy namespace

Published Aug 10, 2026 · Updated Aug 10, 2026

Incorrect authorization in Mastodon 4.6.0-beta.1 through 4.6.3 and 4.7.0-alpha.1 allows remote authenticated users to read local-user PII. The show action in app/controllers/admin/collections_controller.rb authorizes a collection against the general policy instead of the admin policy namespace. A local account and a collection containing the target are required; exposure is limited to the target's current email address and last-used IP address.

CVSS severity7.5
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Incorrect authorization in Mastodon 4.6.0-beta.1 through 4.6.3 and 4.7.0-alpha.1 allows remote authenticated users to read local-user PII. The show action in app/controllers/admin/collections_controller.rb authorizes a collection against the general policy instead of the admin policy namespace. A local account and a collection containing the target are required; exposure is limited to the target's current email address and last-used IP address.

The record

CVE
CVE-2026-72915
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
Mastodon
Product
Mastodon
Classifications
CWE-200
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 4.6.0-beta.1, < 4.6.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mastodon · Mastodonversion=>= 4.6.0-beta.1, < 4.6.4

Published CVSS scores

7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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