CVE-2026-25635 HIGH

CVE-2026-25635: calibre has a Path Traversal Leading to Arbitrary File Write and Potential Code Execution

Vendor Kovidgoyal
Product calibre
Weakness CWE-22 · Path traversal
Published February 6, 2026
Last update February 11, 2026
View on NVD All CVEs

CVSS base score

8.6/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

calibre is an e-book manager. Prior to 9.2.0, Calibre's CHM reader contains a path traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions. On Windows (haven't tested on other OS's), this can lead to Remote Code Execution by writing a payload to the Startup folder, which executes on next login. This vulnerability is fixed in 9.2.0.

Key dates

02Disclosure timeline

February 6, 2026 CVE published
February 11, 2026 Record updated