CVE-2025-22871

Request smuggling due to acceptance of invalid chunked data in net/http

State: Published
Severity: 9.1 Critical
Published: Apr 8, 2025
Updated: May 12, 2026
Reserved: Jan 8, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
net/http/internalGo standard library	before 1.23.8Affected 1.24.0-0 to before 1.24.2Affected

References

https://go.dev/cl/652998
https://go.dev/issue/71988
https://groups.google.com/g/golang-announce/c/Y2uBTVKjBQk
https://pkg.go.dev/vuln/GO-2025-3563
http://www.openwall.com/lists/oss-security/2025/04/04/4
https://cert-portal.siemens.com/productcert/html/ssa-783943.html

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