CVE-2019-18676

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

An issue was discovered in Squid 3.x and 4.x through 4.8. Due to incorrect input validation, there is a heap-based buffer overflow that can result in Denial of Service to all clients using the proxy. Severity is high due to this vulnerability occurring before normal security checks; any remote client that can reach the proxy port can trivially perform the attack via a crafted URI scheme.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-787

Affected software

VendorProductVersions
n/an/an/a

References

Timeline

Published
Nov 26, 2019
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2019

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CVE-2019-18676: High severity, CVSS 7.5 | Vulnix