CVE-2025-4565— Unbounded recursion in Python Protobuf
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I. Basic Information for CVE-2025-4565
Vulnerability Information
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Vulnerability Title
Unbounded recursion in Python Protobuf
Source: NVD (National Vulnerability Database)
Vulnerability Description
Any project that uses Protobuf Pure-Python backend to parse untrusted Protocol Buffers data containing an arbitrary number of recursive groups, recursive messages or a series of SGROUP tags can be corrupted by exceeding the Python recursion limit. This can result in a Denial of service by crashing the application with a RecursionError. We recommend upgrading to version =>6.31.1 or beyond commit 17838beda2943d08b8a9d4df5b68f5f04f26d901
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的递归
Source: NVD (National Vulnerability Database)
Vulnerability Title
Protobuf Pure-Python 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Protobuf Pure-Python是Protobuf开源的一个谷歌的数据交换格式。 Protobuf Pure-Python存在安全漏洞，该漏洞源于解析递归数据时超过Python递归限制，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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| protocolbuffers | Python-Protobuf | 0 ~ 4.25.8 | - | |
| protocolbuffers | Python-Protobuf | 0 ~ 4.25.8 | - |
II. Public POCs for CVE-2025-4565
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same weakness: CWE-674
V. Comments for CVE-2025-4565
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