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.

The remote Fedora 40 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-f974cb8ce5 advisory.

    Includes security fixes to the net/http package, as well as bug fixes to the runtime and the go command.
    [Full changelog](https://github.com/golang/go/issues?q=milestone%3AGo1.23.8+label%3ACherryPickApproved).

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of msft-golang installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-22871 advisory.

  - 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. (CVE-2025-22871)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of golang installed on the remote host is prior to 1.23.8-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2025-2825 advisory.

    The net/http package accepted data in the chunked transfer encoding containing an invalid chunk-size line     terminated by a bare LF. When used in conjunction with a server or proxy which incorrectly interprets a     bare LF in a chunk extension as part of the extension, this could permit request smuggling.
    (CVE-2025-22871)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-77ace1a41b advisory.

    Includes security fixes to the net/http package, as well as bug fixes to the runtime and the go command.
    [Full changelog](https://github.com/golang/go/issues?q=milestone%3AGo1.23.8+label%3ACherryPickApproved).

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2025-933 advisory.

    The net/http package accepted data in the chunked transfer encoding containing an invalid chunk-size line     terminated by a bare LF. When used in conjunction with a server or proxy which incorrectly interprets a     bare LF in a chunk extension as part of the extension, this could permit request smuggling.
    (CVE-2025-22871)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2025:1153-1 advisory.

    - Update to go1.24.2
    - CVE-2025-22871: Fix an issue with request smuggling through invalid chunked data. (bsc#1240550)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2025:1141-1 advisory.

    - Update to go1.23.8
    - CVE-2025-22871: Fix an issue with request smuggling through invalid chunked data. (bsc#1240550)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of Golang running on the remote host is 1.24 prior to 1.24.2. It is, therefore, is affected by multiple vulnerabilities:

  - Unlike request headers, where we are allowed to leniently accept a bare LF in place of a CRLF,     chunked bodies must always use CRLF line terminators. We were already enforcing this for chunk-data lines;
    do so for chunk-size lines as well. Also reject bare CRs anywhere other than as part of the CRLF terminator.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
234731	Fedora 40 : golang (2025-f974cb8ce5)	Nessus	Fedora Local Security Checks	critical
234633	CBL Mariner 2.0 Security Update: msft-golang (CVE-2025-22871)	Nessus	MarinerOS Local Security Checks	critical
234512	Amazon Linux 2 : golang (ALAS-2025-2825)	Nessus	Amazon Linux Local Security Checks	critical
234461	Fedora 41 : golang (2025-77ace1a41b)	Nessus	Fedora Local Security Checks	medium
234340	Amazon Linux 2023 : golang, golang-bin, golang-misc (ALAS2023-2025-933)	Nessus	Amazon Linux Local Security Checks	critical
233984	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : go1.24 (SUSE-SU-2025:1153-1)	Nessus	SuSE Local Security Checks	critical
233887	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : go1.23 (SUSE-SU-2025:1141-1)	Nessus	SuSE Local Security Checks	critical
233871	Golang 1.24 < 1.24.2	Nessus	Windows	high

Detections

Analytics

CVE-2025-22871

critical

Tenable Plugins

critical

critical

critical

medium

critical

critical

critical

high