CVE-2025-53629— cpp-httplib Unbounded Memory Allocation in Chunked/No-Length Requests Vulnerability
Quick assessment
Affected
yhirose cpp-httplib
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
cpp-httplib是yhirose个人开发者的一款使用C++语言编写的HTTP/HTTPS服务器和客户端库。 cpp-httplib 0.23.0之前版本存在安全漏洞，该漏洞源于Transfer-Encoding: chunked头可能导致服务器内存耗尽。
Possible ATT&CK Techniques 1 AI
T1496 · Resource Hijacking
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I. Basic Information for CVE-2025-53629
Vulnerability Information
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Vulnerability Title
cpp-httplib Unbounded Memory Allocation in Chunked/No-Length Requests Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.23.0, incoming requests using Transfer-Encoding: chunked in the header can allocate memory arbitrarily in the server, potentially leading to its exhaustion. This vulnerability is fixed in 0.23.0. NOTE: This vulnerability is related to CVE-2025-53628.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
cpp-httplib 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
cpp-httplib是yhirose个人开发者的一款使用C++语言编写的HTTP/HTTPS服务器和客户端库。 cpp-httplib 0.23.0之前版本存在安全漏洞，该漏洞源于Transfer-Encoding: chunked头可能导致服务器内存耗尽。
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| yhirose | cpp-httplib | < 0.23.0 | - |
|
II. Public POCs for CVE-2025-53629
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Qwen3.6-35B-A3B
· 8296 chars
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III. Intelligence Information for CVE-2025-53629
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IV. Related Vulnerabilities
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Same vendor: yhirose
-
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Same weakness: CWE-770
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V. Comments for CVE-2025-53629
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