Debian Linux - squid - None

Ubuntu Linux - Request Smuggling in HTTP Transfer-Encoding

The version of squid installed on the remote host is prior to 3.5.20-17. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3961 advisory.

    Due to a CWE-841 Improper Enforcement of Behavioral Workflowbug Squid is vulnerable to a Request Smuggling     attack againstHTTP/1.1 Transfer-Encoding.

    This problem allows a trusted client to perform an HTTP RequestSmuggling attack when HTTP/1.1 is used.
    Bypassing securitymechanisms that may be in place between attacker and Squid.

    When there is an HTTP cache operating prior to the affectedSquid, this Request Smuggling attack also     allows the attackerto poison that web cache and store arbitrary malicious contentat any URL for delivery     to other clients future requests. (CVE-2026-61642)

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.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-3145 advisory.

    Due to a CWE-841 Improper Enforcement of Behavioral Workflowbug Squid is vulnerable to a Request Smuggling     attack againstHTTP/1.1 Transfer-Encoding.

    This problem allows a trusted client to perform an HTTP RequestSmuggling attack when HTTP/1.1 is used.
    Bypassing securitymechanisms that may be in place between attacker and Squid.

    When there is an HTTP cache operating prior to the affectedSquid, this Request Smuggling attack also     allows the attackerto poison that web cache and store arbitrary malicious contentat any URL for delivery     to other clients future requests. (CVE-2026-61642)

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

  - Debian Linux - squid - None  Ubuntu Linux - Request Smuggling in HTTP Transfer-Encoding (CVE-2026-61642)

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

ID	Name	Product	Family	Type	Severity
351081	Amazon Linux 2 : squid (ALAS-2026-3961)	Nessus	Amazon Linux Local Security Checks	Local	high
351026	Amazon Linux 2023 : squid (ALAS2023-2026-3145)	Nessus	Amazon Linux Local Security Checks	Local	high
346826	Linux Distros Unpatched Vulnerability : CVE-2026-61642	Nessus	Misc.	Local	critical

Detections

Analytics

CVE-2026-61642

high

Tenable Plugins

high

high

critical