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Vulnerability DatabaseCVE-2026-20031

CVE-2026-20031: 
Clam AntiVirus vulnerability analysis and mitigation

A vulnerability in the HTML Cascading Style Sheets (CSS) module of ClamAV could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to improper error handling when splitting UTF-8 strings. An attacker could exploit this vulnerability by submitting a crafted HTML file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to terminate the scanning process.

Source: NVD

Related Clam AntiVirus vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-20260CRITICAL9.8
  • Clam AntiVirusClam AntiVirus
  • clamav-docs-html
NoYesJun 18, 2025
CVE-2020-37167HIGH8.6
  • Clam AntiVirusClam AntiVirus
  • cpe:2.3:a:clamav:clamav
NoYesFeb 12, 2026
CVE-2025-20234HIGH7.5
  • Clam AntiVirusClam AntiVirus
  • clamav-debuginfo
NoYesJun 18, 2025
CVE-2025-20128HIGH7.5
  • Clam AntiVirusClam AntiVirus
  • clamav1.4
NoYesJan 22, 2025
CVE-2026-20031MEDIUM5.3
  • Clam AntiVirusClam AntiVirus
  • clamav
NoYesMar 04, 2026

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