CVE-2026-20031
ClamAV CSS Image Parsing Error Handling Denial of Service Vulnerability
Severity
Medium 5.3
CVSS 3.1
Exploited
Not listed
EPSS
0.004
34.0th percentile
Discovered by
Third party
Published by the vendor
Published
Mar 4, 2026
Assigned by cisco
Description
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.
Weakness: CWE-248
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco Secure Endpoint | Endpoint / EDR | cna-assigner |
Vendor-reported affected versions (1)
- Cisco · Cisco Secure Endpoint