Vulnerability details
CVE-2026-50129
mastodon mastodon
Mastodon: Persistent anonymous DoS via unhandled NoMethodError in MATH_TRANSFORMER
CVSS 3.1
7.5High
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| mastodon | mastodon | < 4.3.24 | CVEProject cvelistV5 (CNA) |
| mastodon | mastodon | >= 4.4.0-beta.1, < 4.4.18 | CVEProject cvelistV5 (CNA) |
| mastodon | mastodon | >= 4.5.0-beta.1, < 4.5.11 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://github.com/mastodon/mastodon/security/advisories/GHSA-qrgq-9fx2-vf2r x_refsource_CONFIRM
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Details
- Published
- 2026-06-24
- Last updated
- 2026-06-25
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.46%
Probability of exploitation in 30 days
40.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-248Uncaught Exception