CVE-2016-4554

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CVSS 3.0

8.6 high

EPSS

39%p98

Published

May 10, 2016 (May 10, 2016)

Modified

Jun 17, 2026

Description

mime_header.cc in Squid before 3.5.18 allows remote attackers to bypass intended same-origin restrictions and possibly conduct cache-poisoning attacks via a crafted HTTP Host header, aka a "header smuggling" issue.

Vendors: oracle squid-cache canonical
Products: linux, squid, ubuntu linux
Weakness: CWE-345
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

NVD CVE.org GitHub PoCs EPSS (38.9%)

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