CVE-2026-20031: ClamAV CSS Image Parsing Error Handling Denial of Service Vulnerability
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-20031?
The severity of CVE-2026-20031 is classified as high due to its potential to cause a denial of service.
How do I fix CVE-2026-20031?
To fix CVE-2026-20031, ensure that you update ClamAV to the latest version that addresses this vulnerability.
Who is affected by CVE-2026-20031?
CVE-2026-20031 affects users of Cisco ClamAV using the HTML Cascading Style Sheets module.
What kind of attack is possible through CVE-2026-20031?
CVE-2026-20031 allows an unauthenticated, remote attacker to trigger a denial of service condition on affected devices.
What component of ClamAV does CVE-2026-20031 involve?
CVE-2026-20031 involves the HTML Cascading Style Sheets (CSS) module of ClamAV.