CVE-2026-42304— Twisted: Denial of Service (DoS) in twisted.names via Crafted DNS Compression Pointer Chains
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-42304
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Twisted: Denial of Service (DoS) in twisted.names via Crafted DNS Compression Pointer Chains
Source: NVD (National Vulnerability Database)
Vulnerability Description
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.4.0rc2, the twisted.names module is vulnerable to a Denial of Service (DoS) attack via resource exhaustion during DNS name decompression. A remote, unauthenticated attacker can exploit this by sending a crafted TCP DNS packet containing deeply chained compression pointers. This flaw bypasses previous loop-prevention logic, causing the single-threaded Twisted reactor to hang while processing millions of recursive lookups, effectively freezing the server. This vulnerability is fixed in 26.4.0rc2.
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
未加控制的资源消耗(资源穷尽)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Twisted 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Twisted是Twisted Matrix Labs开源的一款使用Python语言编写的事件驱动的开源网络引擎。 Twisted 26.4.0rc2之前版本存在资源管理错误漏洞，该漏洞源于twisted.names模块在DNS名称解压缩期间存在资源耗尽问题，可能导致远程未认证攻击者通过发送特制TCP DNS数据包造成拒绝服务。
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-2026-42304
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-42304
请登录查看更多情报信息。
- https://github.com/twisted/twisted/security/advisories/GHSA-grgv-6hw6-v9g4x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-42304
IV. Related Vulnerabilities
Same product: twisted
- CVE-2024-41810
HTML injection in HTTP redirect body - CVE-2024-41671
twisted.web has disordered HTTP pipeline response - CVE-2023-46137
twisted.web has disordered HTTP pipeline response - CVE-2022-39348
Twisted vulnerable to NameVirtualHost Host header injection - CVE-2022-24801
HTTP Request Smuggling in twisted.web
Same vendor: twisted
- CVE-2024-41810
HTML injection in HTTP redirect body - CVE-2024-41671
twisted.web has disordered HTTP pipeline response - CVE-2023-46137
twisted.web has disordered HTTP pipeline response - CVE-2022-39348
Twisted vulnerable to NameVirtualHost Host header injection - CVE-2022-24801
HTTP Request Smuggling in twisted.web
Same weakness: CWE-400
- CVE-2026-44248
Netty: Resource exhaustion in MqttDecoder - CVE-2026-42587
Netty: HttpContentDecompressor maxAllocation bypass via Cont - CVE-2026-42583
Netty: Lz4FrameDecoder resource exhaustion - CVE-2026-44456
Hono: bodyLimit() can be bypassed for chunked / unknown-leng - CVE-2026-44241
Micronaut Framework: Unbounded formattersCache in TimeConver
V. Comments for CVE-2026-42304
No comments yet