Is CVE-2026-20346 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-20346?

CVE-2026-20346 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-20346

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.