Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-72915— Mastodon: Personally-identifying information disclosure due to incorrect access control validation

Quick assessment

Affected
mastodon mastodon
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mastodon是Mastodon组织的一款去中心化社交网络服务器软件。 Mastodon 4.6.0-beta.1版本至4.6.4之前版本存在信息泄露漏洞，该漏洞源于控制器使用通用collection策略而非admin collection策略命名空间，可能导致已登录本地用户访问其他用户的个人身份信息，包括当前电子邮件地址和上次使用的IP地址。

CVSS 7.5 · High EPSS 0.48% · P39

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
mastodon mastodon >= 4.6.0-beta.1, < 4.6.4 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-72915

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Mastodon: Personally-identifying information disclosure due to incorrect access control validation
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Mastodon 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mastodon是Mastodon组织的一款去中心化社交网络服务器软件。 Mastodon 4.6.0-beta.1版本至4.6.4之前版本存在信息泄露漏洞，该漏洞源于控制器使用通用collection策略而非admin collection策略命名空间，可能导致已登录本地用户访问其他用户的个人身份信息，包括当前电子邮件地址和上次使用的IP地址。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
mastodon mastodon >= 4.6.0-beta.1, < 4.6.4 -

II. Public POCs for CVE-2026-72915

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-72915

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-72915 (2)

Vendor Advisories for CVE-2026-72915 (1)

Vendor Pages for CVE-2026-72915 (1)

Same Patch Batch · mastodon · 2026-08-10 · 3 CVEs total

CVE-2026-72914 7.5 HIGH Mastodon: Exhausting data by an unauthenticated request to the admin retention API
CVE-2026-72916 6.3 MEDIUM Mastodon: SSRF Protection Bypass via IPv4-compatible IPv6 Addresses

IV. Related Vulnerabilities

Same product: mastodon
Same vendor: mastodon
Same weakness: CWE-200

V. Comments for CVE-2026-72915

No comments yet

Leave a comment