CVE-2021-28651

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to a buffer-management bug, it allows a denial of service. When resolving a request with the urn: scheme, the parser leaks a small amount of memory. However, there is an unspecified attack methodology that can easily trigger a large amount of memory consumption.

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-401

Affected software

VendorProductVersions
n/an/an/a

References

Timeline

Published
May 27, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-28651: High severity, CVSS 7.5 | Vulnix