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Joinmastodon

12 known vulnerabilities

4
HIGH
8
MEDIUM

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mastodon 12
12 CVEs
7.5
CVE-2026-41259

Mastodon is a free, open-source social network server based on ActivityPub. Prior to v4.5.9, v4.4.16, and v4.3.22, Masto

4.8
CVE-2026-33869

Mastodon is a free, open-source social network server based on ActivityPub. In versions on the 4.5.x branch prior to 4.5

4.3
CVE-2026-33868

Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 4.5.8, 4.4.15, and 4.3.21,

5.9
CVE-2026-27477

Mastodon is a free, open-source social network server based on ActivityPub. FASP registration requires manual approval b

8.2
CVE-2026-27468

Mastodon is a free, open-source social network server based on ActivityPub. FASP registration requires manual approval b

6.5
CVE-2026-25540

Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 4.3.19, 4.4.13, 4.5.6, Mas

6.5
CVE-2026-23964

Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 4.5.5, 4.4.12, and 4.3.18,

4.3
CVE-2026-23963

Mastodon is a free, open-source social network server based on ActivityPub. Prior to versions 4.5.5, 4.4.12, and 4.3.18,

7.5
CVE-2026-23962

Mastodon is a free, open-source social network server based on ActivityPub. Mastodon versions before v4.3.18, v4.4.12, a

5.3
CVE-2026-23961

Mastodon is a free, open-source social network server based on ActivityPub. Mastodon allows server administrators to sus

6.5
CVE-2026-22246

Mastodon is a free, open-source social network server based on ActivityPub. Mastodon 4.3 added notifications of severed

7.5
CVE-2026-22245

Mastodon is a free, open-source social network server based on ActivityPub. By nature, Mastodon performs a lot of outbou

Frequently Asked Questions

How many CVEs affect Joinmastodon?

Joinmastodon has 12 CVE records in our database, including 0 critical and 4 high severity vulnerabilities.

What are the most severe Joinmastodon vulnerabilities?

Joinmastodon has 0 critical severity (CVSS 9.0+) and 4 high severity (CVSS 7.0-8.9) vulnerabilities. Review the list above sorted by publication date to find the most recent high-severity issues.

How can I scan for Joinmastodon vulnerabilities?

CyberStrike's AI-powered security agents automatically detect vulnerabilities in Joinmastodon products across your infrastructure. The platform provides continuous pentesting, DAST scanning, and real-time vulnerability monitoring with actionable remediation guidance.

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