CVE-2018-21035
HIGH
7.5
CVSS Score
Published: February 28, 2020 at 07:17 PM UTC
Updated: June 17, 2026 at 01:54 AM UTC
1 product affected across 1 vendorQt
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Severity
HIGH7.5
Exploit prediction
EPSS 2%
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).
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://bugreports.qt.io/browse/QTBUG-70693x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://codereview.qt-project.org/c/qt/qtwebsockets/+/284735CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-770
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