Uncaught Exception Affecting clamav package, versions <1.4.4+dfsg-0ubuntu0.26.04.1


Severity

Recommended
0.0
medium
0
10

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.41% (33rd percentile)

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  • Snyk IDSNYK-UBUNTU2604-CLAMAV-16237193
  • published27 Apr 2026
  • disclosed4 Mar 2026

Introduced: 4 Mar 2026

CVE-2026-20031  (opens in a new tab)
CWE-248  (opens in a new tab)

How to fix?

Upgrade Ubuntu:26.04 clamav to version 1.4.4+dfsg-0ubuntu0.26.04.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream clamav package and not the clamav package as distributed by Ubuntu. See How to fix? for Ubuntu:26.04 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1