Upstream information

CVE-2026-61642 at MITRE

Description

Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing (`src/HttpHeader.cc`) accepted the bare` Transfer-Encoding:` identity form, which the HTTP specification prohibits because any transfer coding must be wrapped within chunked encoding. This problem allows a trusted client to perform an HTTP Request Smuggling attack when HTTP/1.1 is used, bypassing security mechanisms that may be in place between attacker and Squid. When there is an HTTP cache operating prior to the affected Squid, this Request Smuggling attack also allows the attacker to poison that web cache and store arbitrary malicious content at any URL for delivery to other clients' future requests. This issue is fixed in version 7.6.

SUSE information

Overall state of this security issue: Does not affect SUSE products

No SUSE Bugzilla entries cross referenced.

SUSE Security Advisories:

SUSE Timeline for this CVE

CVE page created: Sat Sep 12 12:37:27 2026
CVE page last modified: Tue Oct 13 20:47:32 2026