Vulnerability details

CVE-2026-25635

kovidgoyal calibre

calibre has a Path Traversal Leading to Arbitrary File Write and Potential Code Execution

CVSS 3.1

8.6High

Official description

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.

CVSS scores

Score	Version	Source	Vector
8.6High	3.1	CVEProject cvelistV5 (CNA) (GitHub_M)	`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
kovidgoyal	calibre	< 9.2.0	CVEProject cvelistV5 (CNA)

References and advisories

https://github.com/kovidgoyal/calibre/security/advisories/GHSA-32vh-whvh-9fxr x_refsource_CONFIRM
https://github.com/kovidgoyal/calibre/commit/9739232fcb029ac15dfe52ccd4fdb4a07ebb6ce9 x_refsource_MISC
https://0x5t.raptx.org/posts/calibre-chm-rce

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Details

Published: 2026-02-06
Last updated: 2026-02-11
State: Published
Assigner (CNA): GitHub_M

Exploit prediction (EPSS)

0.5%

Probability of exploitation in 30 days

43.2%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-22
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')