CVE-2018-21035

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

In Qt through 5.14.1, the WebSocket implementation accepts up to 2GB for frames and 2GB for messages. Smaller limits cannot be configured. This makes it easier for attackers to cause a denial of service (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-770

Affected software

No affected versions have been published.

Timeline

Published
Feb 28, 2020
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2018-21035: High severity, CVSS 7.5 | Vulnix