CVE-2023-36461— Mastodon vulnerable to Denial of Service through slow HTTP responses
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I. Basic Information for CVE-2023-36461
Vulnerability Information
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Vulnerability Title
Mastodon vulnerable to Denial of Service through slow HTTP responses
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mastodon 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mastodon是一款基于ActivityPub的开源社交网络服务器。 Mastodon存在安全漏洞，该漏洞源于允许恶意服务器通过慢速攻击延长响应的持续时间，从而导致服务器无响应。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-36461
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- https://github.com/mastodon/mastodon/releases/tag/v4.0.5x_refsource_MISC
- https://github.com/mastodon/mastodon/releases/tag/v4.1.3x_refsource_MISC
- https://github.com/mastodon/mastodon/releases/tag/v3.5.9x_refsource_MISC
- https://github.com/mastodon/mastodon/security/advisories/GHSA-9pxv-6qvf-pjwcx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2023-36461
Same Patch Batch · mastodon · 2023-07-06 · 4 CVEs total
| CVE-2023-36460 | 10.0 CRITICAL | Mastodon vulnerable to arbitrary file creation through media attachments |
| CVE-2023-36459 | 9.3 CRITICAL | Mastodon vulnerable to Cross-site Scripting through oEmbed preview cards |
| CVE-2023-36462 | 5.4 MEDIUM | Mastodon's verified profile links can be formatted in a misleading way |
IV. Related Vulnerabilities
Same product: mastodon
- CVE-2026-41259
Mastodon: Insufficient verification of email addresses - CVE-2026-33869
Mastodon has a denial of service for quote authorization - CVE-2026-33868
Mastodon has a GET-Based Open Redirect via '/web/%2F<domain> - CVE-2026-27477
Mastodon has SSRF via unvalidated FASP Provider base_url - CVE-2026-27468
Mastodon may allow unconfirmed FASP to make subscriptions
Same vendor: mastodon
- CVE-2026-41259
Mastodon: Insufficient verification of email addresses - CVE-2026-33869
Mastodon has a denial of service for quote authorization - CVE-2026-33868
Mastodon has a GET-Based Open Redirect via '/web/%2F<domain> - CVE-2026-27477
Mastodon has SSRF via unvalidated FASP Provider base_url - CVE-2026-27468
Mastodon may allow unconfirmed FASP to make subscriptions
Same weakness: CWE-770
- CVE-2026-42294
Argo Workflows: Unauthenticated Memory Exhaustion (DoS) in W - CVE-2026-42189
Russh: Pre-auth DoS via unbounded allocation in keyboard-int - CVE-2026-42793
Atom table exhaustion via attacker-controlled GraphQL SDL na - CVE-2026-44499
ZEBRA: Permanent Block Discovery Halt via Gossip Queue Satur - CVE-2026-44500
ZEBRA: Allocation Amplification in Inbound Network Deseriali
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