CVE-2019-18860

MEDIUM 6.1CVE-2019-18860 · Published 20/03/2020 · updated 17/06/2026

In short

CVE-2019-18860 is a MEDIUM (CVSS 6.1) vulnerability affecting squid (squid-cache).
Chance of exploitation in the next 30 days (EPSS): 5.0%, higher than 92.2% of all vulnerabilities.
Fix: update to 4.9 or later.

Package	Affected versions	Patched versions
squid squid-cache	`< 4.9`	`4.9`

Squid before 4.9, when certain web browsers are used, mishandles HTML in the host (aka hostname) parameter to cachemgr.cgi.

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Package

Affected versions

Patched versions

< 4.9

4.9

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