What is CVE-2026-50129?

CVE-2026-50129 is a high-severity vulnerability in Mastodon, classified under CWE-248. CVSS score: 7.5/10. Published 2026-06-24.

How severe is CVE-2026-50129?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Mastodon

CVE-2026-50129

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. Malforme…

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Mastodon — versions >= 4.5.0-beta.1, < 4.5.11, >= 4.4.0-beta.1, < 4.4.18, < 4.3.24

Weakness classification (CWE)

CWE-248

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-50129?: CVE-2026-50129 is a high-severity vulnerability in Mastodon, classified under CWE-248. CVSS score: 7.5/10. Published 2026-06-24.
How severe is CVE-2026-50129?: High severity. CVSS v3 base score is 7.5 out of 10.