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CVE-2025-22871— Request smuggling due to acceptance of invalid chunked data in net/http

Quick assessment

Affected
Go standard library net/http/internal
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于接受裸LF作为分块数据行终止符，允许请求走私。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.78% · P53

Possible ATT&CK Techniques 1 AI

T1071 · Application Layer Protocol

Affected Version Matrix 2

VendorProduct Version RangeStatus
Go standard library net/http/internal < 1.23.8 affected
1.24.0-0< 1.24.2 affected
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I. Basic Information for CVE-2025-22871

Vulnerability Information
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Vulnerability Title
Request smuggling due to acceptance of invalid chunked data in net/http
Source: CVE Program / CVE List V5
Vulnerability Description
The net/http package improperly accepts a bare LF as a line terminator in chunked data chunk-size lines. This can permit request smuggling if a net/http server is used in conjunction with a server that incorrectly accepts a bare LF as part of a chunk-ext.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Google Go 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于接受裸LF作为分块数据行终止符，允许请求走私。
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
Go standard library net/http/internal 0 ~ 1.23.8 -

II. Public POCs for CVE-2025-22871

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III. Intelligence Information for CVE-2025-22871

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IV. Related Vulnerabilities

Same product: net/http/internal
Same vendor: Go standard library

V. Comments for CVE-2025-22871

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