Path traversal in Calibre - CVE-2026-26065
Published: February 20, 2026
Vulnerability identifier: #VU123107
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
CVE-ID: CVE-2026-26065
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Calibre
Affected software:
Calibre
Calibre
Detailed vulnerability description
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences eReader PDB readers. A remote attacker can write arbitrary files on the system, leading to arbitrary code execution.
How to mitigate CVE-2026-26065
Install updates from vendor's website.