CVE-2025-69229— AIOHTTP vulnerable to DoS through chunked messages
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I. Basic Information for CVE-2025-69229
Vulnerability Information
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Vulnerability Title
AIOHTTP vulnerable to DoS through chunked messages
Source: NVD (National Vulnerability Database)
Vulnerability Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks. If an application makes use of the request.read() method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time. This issue is fixed in version 3.13.3.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
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
aiohttp 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
aiohttp是aio-libs开源的一个开源的用于 asyncio 和 Python 的异步 HTTP 客户端/服务器框架。 aiohttp 3.13.2及之前版本存在安全漏洞，该漏洞源于处理大量分块消息时可能导致CPU过度阻塞，可能导致拒绝服务攻击。
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-2025-69229
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- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g84x-mcqj-x9qqx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2025-69229
Same Patch Batch · aio-libs · 2026-01-05 · 8 CVEs total
| CVE-2025-69223 | 7.5 HIGH | AIOHTTP's HTTP Parser auto_decompress feature is vulnerable to zip bomb |
| CVE-2025-69230 | AIOHTTP Vulnerable to Cookie Parser Warning Storm | |
| CVE-2025-69227 | AIOHTTP vulnerable to DoS when bypassing asserts | |
| CVE-2025-69226 | AIOHTTP allows for a brute-force leak of internal static filepath components | |
| CVE-2025-69225 | AIOHTTP Regex Mismatch Allows Unicode in ASCII-Only Protocol Fields | |
| CVE-2025-69224 | AIOHTTP's Unicode processing of header values could cause parsing discrepancies | |
| CVE-2025-69228 | AIOHTTP vulnerable to denial of service through large payloads |
IV. Related Vulnerabilities
Same product: aiohttp
- CVE-2026-34525
AIOHTTP: Duplicate Host header accepted - CVE-2026-34520
AIOHTTP: C parser (llhttp) accepts null bytes and control ch - CVE-2026-34519
AIOHTTP: HTTP response splitting via \r in reason phrase - CVE-2026-34518
AIOHTTP: Cookie and Proxy-Authorization headers leaked on cr - CVE-2026-34517
AIOHTTP: Late size enforcement for non-file multipart fields
Same vendor: aio-libs
- CVE-2026-34525
AIOHTTP: Duplicate Host header accepted - CVE-2026-34520
AIOHTTP: C parser (llhttp) accepts null bytes and control ch - CVE-2026-34519
AIOHTTP: HTTP response splitting via \r in reason phrase - CVE-2026-34518
AIOHTTP: Cookie and Proxy-Authorization headers leaked on cr - CVE-2026-34517
AIOHTTP: Late size enforcement for non-file multipart fields
Same weakness: CWE-770
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Argo Workflows: Unauthenticated Memory Exhaustion (DoS) in W - CVE-2026-42189
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ZEBRA: Permanent Block Discovery Halt via Gossip Queue Satur - CVE-2026-44500
ZEBRA: Allocation Amplification in Inbound Network Deseriali
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