CVE-2026-50129
Mastodon: Persistent anonymous DoS via unhandled NoMethodError in MATH_TRANSFORMER
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.5.11, 4.4.18, and 4.3.24, a DoS can be triggered by (Uncaught Exception vulerability), due to missing exception handling in the math sanitizer. Malformed <math> nodes can result in a DoS of a whole server or targeted users services, depending on the type of action that includes the malformed nodes and the services interacting with it. This vulnerability is fixed in 4.5.11, 4.4.18, and 4.3.24.
| CWE | CWE-248 |
| Vendor | mastodon |
| Product | mastodon |
| Published | Jun 24, 2026 |
Stay Ahead of the Next One
Get instant alerts for mastodon mastodon
Be the first to know when new high vulnerabilities affecting mastodon mastodon are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
mastodon / mastodon
>= 4.5.0-beta.1, < 4.5.11 >= 4.4.0-beta.1, < 4.4.18 < 4.3.24