CVE-2026-26065CWE-22

calibre: Path Traversal can Lead to Arbitrary File Write and Potential Code Execution

Critical · published February 20, 2026

CVSS v4.0
9.3
EPSS
1%
Percentile
49.2
In the wild
Unconfirmed
What it is

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below are vulnerable to Path Traversal through PDB readers (both 132-byte and 202-byte header variants) that allow arbitrary file writes with arbitrary extension and arbitrary content anywhere the user has write permissions. Files are written in 'wb' mode, silently overwriting existing files. This can lead to potential code execution and Denial of Service through file corruption. This issue has been fixed in version 9.3.0.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS
0.00622 · 49.2th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-02-20T01:54Z
EPSS history
Timeline
  • 20 FEB 01:54Z
    calibre: Path Traversal can Lead to Arbitrary File Write and Potential Code Execution
    cvelistv5