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CVE-2026-20031

ClamAV CSS Image Parsing Error Handling Denial of Service Vulnerability

Published: Mar 4, 2026Updated: Mar 5, 2026 Sources: CVE List NVDCWE-248
5.3MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 65.9%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
No Fix Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-248

Affected Products

Cisco
commercial·USaka cisco systems inc., cisco systems
Cisco Secure Endpoint
Networking Infrastructure

Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

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References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-css-Fn4QSZ
sec.cloudapps.cisco.com

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