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CVE-2016-4554

mime_header.cc in Squid before 3.5.18 allows remote attackers to bypass intended same-origin restrictions and possibly conduct…

High8.6EPSS 38.9%
Published
Updated
Reserved
Assigned by
mitre

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.

Scores

CVSS scores of CVE-2016-4554, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.0High8.6CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
EPSS (exploitation in 30 days)
38.9% · top 1.4% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.6.

Weakness

Affected products

  • n/a

    • affected n/a

References (17)

Sources

The same CVE in the primary databases and aggregators, to check against.

Record last updated .