Is CVE-2019-18860 actively exploited?

CVE-2019-18860 has no public evidence of in-the-wild exploitation as of 2025-11-05.

What is the CVSS score for CVE-2019-18860?

CVE-2019-18860 has a CVSS score of 6.1 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

How do I patch CVE-2019-18860?

Patch guidance is available from squid-cache security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2019-18860.

CVE-2019-18860 - remediation guidance & executive summary

Q: Which products are affected by CVE-2019-18860?

8 products: squid-cache squid, debian debian linux, debian debian linux, canonical ubuntu linux, canonical ubuntu linux, and 3 more.

Description

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

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: required
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-74

Metadata

Primary Vendor: SQUID-CACHE
Published: 3/20/2020
Last Modified: 11/5/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

squid-cache : squiddebian : debian_linuxdebian : debian_linuxcanonical : ubuntu_linuxcanonical : ubuntu_linuxcanonical : ubuntu_linuxcanonical : ubuntu_linuxopensuse : leap

Remediation Guidance

Executive Summary

Cite this page

CVE-2019-18860. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2019-18860

View on NIST NVD

CVE-2019-18860 vulnerability