CVE-2026-25635: calibre has a Path Traversal Leading to Arbitrary File Write and Potential Code Execution
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.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-25635?
CVE-2026-25635 has a high severity due to its ability to allow arbitrary file writes and potential code execution.
How do I fix CVE-2026-25635?
To fix CVE-2026-25635, upgrade Calibre to version 9.2.0 or later.
What software is affected by CVE-2026-25635?
CVE-2026-25635 affects Calibre versions prior to 9.2.0.
How does CVE-2026-25635 exploit path traversal?
CVE-2026-25635 exploits path traversal vulnerabilities in the CHM reader, allowing unauthorized file writes.
What are the potential consequences of CVE-2026-25635?
The potential consequences of CVE-2026-25635 include arbitrary file write access and the risk of executing malicious code.