What is the severity of CVE-2025-22871?

CVE-2025-22871 is rated as a medium severity vulnerability affecting the net/http package in Google Go.

How does CVE-2025-22871 impact applications?

CVE-2025-22871 can lead to request smuggling vulnerabilities if a net/http server interacts with another server that improperly handles bare LF in chunk-size lines.

How do I fix CVE-2025-22871?

To fix CVE-2025-22871, upgrade to the latest version of Google Go where the vulnerability has been addressed.

What versions of Go are affected by CVE-2025-22871?

CVE-2025-22871 affects all versions of Google Go prior to the patch for this vulnerability.

What should I do if I cannot update my Go application to address CVE-2025-22871?

If you cannot update, implement additional security measures such as using a different server implementation that properly handles request parsing.

Vulnerability/
CVE-2025-22871

CWE

444

4/4/2025

8/4/2025

9/4/2025

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

First published: Fri Apr 04 2025(Updated: )

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.

Credit: security@golang.org

Affected Software	Affected Version	How to fix
Go (Golang) language by Google

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Frequently Asked Questions

What is the severity of CVE-2025-22871?
CVE-2025-22871 is rated as a medium severity vulnerability affecting the net/http package in Google Go.
How does CVE-2025-22871 impact applications?
CVE-2025-22871 can lead to request smuggling vulnerabilities if a net/http server interacts with another server that improperly handles bare LF in chunk-size lines.
How do I fix CVE-2025-22871?
To fix CVE-2025-22871, upgrade to the latest version of Google Go where the vulnerability has been addressed.
What versions of Go are affected by CVE-2025-22871?
CVE-2025-22871 affects all versions of Google Go prior to the patch for this vulnerability.
What should I do if I cannot update my Go application to address CVE-2025-22871?
If you cannot update, implement additional security measures such as using a different server implementation that properly handles request parsing.

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