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
35.4th percentile
Discovered by
Third party
Vendor-published field
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 products (1)
- Cisco · Cisco Secure Endpoint