HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported `Content-Encoding` header value in the response message. Please note this defect does not affect HttpClient based on the async i/o model. This issue affects Apache HttpComponents Client: from 5.0-alpha1 through 5.6.2.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the
    connection manager if it encounters an invalid or unsupported `Content-Encoding` header value in the
    response message. Please note this defect does not affect HttpClient based on the async i/o model. This
    issue affects Apache HttpComponents Client: from 5.0-alpha1 through 5.6.2. (CVE-2026-64607)

The remote openSUSE 16 host has packages installed that are affected by a vulnerability as referenced in the openSUSE- SU-2026:21894-1 advisory.

    This update for httpcomponents-client fixes the following issue:

    - CVE-2026-64607: improper release of underlying connection back to connection manager when an invalid or     unsupported       `Content-Encoding` header value in a response message (bsc#1273163).

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 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:4028-1 advisory.

    This update for httpcomponents-client fixes the following issue:

    - CVE-2026-64607: improper release of underlying connection back to connection manager when an invalid or     unsupported       `Content-Encoding` header value in a response message (bsc#1273163).

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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the     connection manager if it encounters an invalid or unsupported `Content-Encoding` header value in the     response message. Please note this defect does not affect HttpClient based on the async i/o model. This     issue affects Apache HttpComponents Client: from 5.0-alpha1 through 5.6.2. (CVE-2026-64607)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
462254	Echo: org.apache.httpcomponents.client5:httpclient5: security update to 5.6.3	Tenable Cloud Security	Echo Local Security Checks	Local	medium
462254	Echo: org.apache.httpcomponents.client5:httpclient5: security update to 5.6.3	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
350155	openSUSE 16: httpcomponents-client / httpcomponents-client-cache / etc (openSUSE-SU-2026:21894-1)	Nessus	SuSE Local Security Checks	Local	medium
348415	SUSE SLED15 / SLES15 Security Update : httpcomponents-client (SUSE-SU-2026:4028-1)	Nessus	SuSE Local Security Checks	Local	medium
331530	Linux Distros Unpatched Vulnerability : CVE-2026-64607	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-64607

medium

Tenable Plugins

medium

medium

medium

medium

medium