CVE-2023-36461
HIGH7.5EPSS 0.22%Mastodon vulnerable to Denial of Service through slow HTTP responses
Published: 3/6/2024Modified: 10/15/2025
Description
Mastodon is a free, open-source social network server based on ActivityPub. When performing outgoing HTTP queries, Mastodon sets a timeout on individual read operations. Prior to versions 3.5.9, 4.0.5, and 4.1.3, a malicious server can indefinitely extend the duration of the response through slowloris-type attacks. This vulnerability can be used to keep all Mastodon workers busy for an extended duration of time, leading to the server becoming unresponsive. Versions 3.5.9, 4.0.5, and 4.1.3 contain a patch for this issue.
Affected packages (1)
- Bitnami/mastodonfrom 0, < 3.5.9, >= 4.0.0, < 4.0.5, >= 4.1.0, < 4.1.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (7)
- WEBhttps://github.com/mastodon/mastodon/commit/c5929798bf7e56cc2c79b15bed0c4692ded3dcb6
- WEBhttps://github.com/mastodon/mastodon/releases/tag/v3.5.9
- WEBhttps://github.com/mastodon/mastodon/releases/tag/v4.0.5
- WEBhttps://github.com/mastodon/mastodon/releases/tag/v4.1.3
- WEBhttps://github.com/mastodon/mastodon/security/advisories/GHSA-9pxv-6qvf-pjwc
- WEBhttps://nvd.nist.gov/vuln/detail/CVE-2023-36461
- WEBhttp://www.openwall.com/lists/oss-security/2023/07/06/7