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Vulnerabilities CVE-2026-20346

CVE-2026-20346

High
Open
TLP:CLEAR

ClamAV PDF File Format Processing Memory Corruption Vulnerability

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Description

A vulnerability in the PDF 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 PDF files during scanning, which may result in an out-of-bounds buffer read. An attacker could exploit this vulnerability by submitting a crafted PDF file 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.

Details

CVSS Score
7.5
EPSS Score
0.33%

25.3th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Aug 7, 2026
Last Modified
Aug 7, 2026
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