VULNERABILITY INTELLIGENCE

CVE-2018-21035

CVSS score7.5 HIGH
EPSS probability2.34%
CISA KEVNot currently listed
Published2020-02-28
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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).

Weakness classification

  • CWE-770: Allocation of Resources Without Limits or Throttling

Primary references