CVE-2026-25635

8.6 highEPSS 0.5%

High (8.6) in calibre-ebook calibre. EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

8.6 high

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-31)
CWE: CWE-22
Published: 2026-02-06
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

calibre-ebook:calibre

References

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

Check your stack JSON