Path Traversal Vulnerability in Calibre E-book Manager by Kovid Goyal
CVE-2026-25635

8.6HIGH

Key Information:

Vendor

Kovidgoyal

Status
Calibre
Vendor
CVE Published:
6 February 2026

What is CVE-2026-25635?

Calibre, a popular e-book management tool, contains a path traversal vulnerability in its CHM reader prior to version 9.2.0. This flaw allows malicious users to perform arbitrary file writes in locations where the user has write permissions. On Windows systems, this can facilitate Remote Code Execution by allowing an attacker to place a malicious payload in the Startup folder, which would execute on the user's next login. Users are urged to update to version 9.2.0 or later to mitigate this risk. For more details, please refer to the advisory and fix linked in the references.

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Affected Version(s)

calibre < 9.2.0

References

https://github.com/kovidgoyal/calibre/security/advisories...
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https://github.com/kovidgoyal/calibre/commit/9739232fcb02...
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CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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