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Vulnerability record · CVE-2016-4554 · published 10 May 2016

CVE-2016-4554: Oracle linux insufficient verification of data authenticity vulnerability

Oracle · Linux

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.

8.6 CVSS 3.0 High EPSS 39% · top 1.5% CWE-345 · Insufficient verification of data authenticity
8.6CVSS 3.0 base score, v2 5.0
39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
34References
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html
http://www.debian.org/security/2016/dsa-3625
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html Third Party Advisory
http://www.securitytracker.com/id/1035769 Third Party Advisory
http://www.squid-cache.org/Advisories/SQUID-2016_8.txt Vendor Advisory
http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID-2016_8.patch Patch
http://www.squid-cache.org/Versions/v3/3.2/changesets/SQUID-2016_8.patch Patch
http://www.squid-cache.org/Versions/v3/3.3/changesets/SQUID-2016_8.patch Patch
http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_8.patch Patch
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_8.patch Patch
http://www.ubuntu.com/usn/USN-2995-1 Third Party Advisory
https://access.redhat.com/errata/RHSA-2016:1138
https://access.redhat.com/errata/RHSA-2016:1139
https://access.redhat.com/errata/RHSA-2016:1140
https://security.gentoo.org/glsa/201607-01
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html
http://www.debian.org/security/2016/dsa-3625
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html Third Party Advisory
http://www.securitytracker.com/id/1035769 Third Party Advisory
http://www.squid-cache.org/Advisories/SQUID-2016_8.txt Vendor Advisory
http://www.squid-cache.org/Versions/v3/3.1/changesets/SQUID-2016_8.patch Patch
http://www.squid-cache.org/Versions/v3/3.2/changesets/SQUID-2016_8.patch Patch
http://www.squid-cache.org/Versions/v3/3.3/changesets/SQUID-2016_8.patch Patch
http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_8.patch Patch
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_8.patch Patch
http://www.ubuntu.com/usn/USN-2995-1 Third Party Advisory
https://access.redhat.com/errata/RHSA-2016:1138
https://access.redhat.com/errata/RHSA-2016:1139
https://access.redhat.com/errata/RHSA-2016:1140
https://security.gentoo.org/glsa/201607-01

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Source: NIST National Vulnerability Database (record CVE-2016-4554), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.