UpHeron
All vulnerabilities

Servers and applications

CVE-2023-36461

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…

Severity
High 7.5
Published
6 Jul 2023
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
3.5.9, 4.0.5, 4.1.3
Sources
NVD

Affected software

SoftwareAffected versions
MastodonServers and applications · cpe:a:joinmastodon:mastodon
  • Every version before 3.5.9
  • From 4.0.0 before 4.0.5
  • From 4.1.0 before 4.1.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-36461
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-36461