Resource exhaustion in Mastodon

CVE-2026-72914

Mastodon is a free, open-source social network server based on ActivityPub. Prior to 4.4.21, 4.5.14, 4.6.4, and 4.7.0-beta.1, the administrative statistics endpoints handled by Api::V1::Admin::MeasuresController and Api::V1::Admin::Retenti…

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 < 4.4.21, >= 4.5.0-beta.1, < 4.5.14, >= 4.6.0-beta.1, < 4.6.4

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-72914?
CVE-2026-72914 is a high-severity vulnerability in Mastodon, classified under Asymmetric Resource Consumption (Amplification). CVSS score: 7.5/10. Published 2026-08-10.
How severe is CVE-2026-72914?
High severity. CVSS v3 base score is 7.5 out of 10.