CVE-2026-20348

HIGH

CVE: CVE-2026-20348 - A vulnerability in the XAR file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possi...Sign in to save

CVSS

7.5

CVSS v3.1

EPSS

0.3%

Exploit Prediction Score

Published

August 7, 2026

Exploitability

EPSS probability 0.3%

Description

A vulnerability in the XAR file format parser of ClamAV could allow an unauthenticated, remote attacker to cause a DoS condition or possibly other expanded impacts as a result of memory corruption on an affected device. This vulnerability is due to improper boundary checks for content in XAR files during scanning. An attacker could exploit this vulnerability by submitting a crafted file that contains XAR content to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to cause the ClamAV scanning process to terminate, resulting in a DoS condition on the affected software.

Weaknesses

CWE-120

Affected Packages

No package data available.

Aliases

CVE-2026-20348

Related references

Publisher and database URLs for this record (shown for attribution; reading stays in Bugflare).

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-clamav-WuuvVd26