calibre: calibre is an e-book manager
CVE-2026-25635 is fixed in calibre on 1 platform, first by DEBIAN-CVE-2026-25635, released February 6, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| calibre · Debian 12.15 (bookworm) | 6.13.0+repack-2+deb12u6 | DEBIAN-CVE-2026-25635 | Feb 6, 2026 |
| calibre · Debian 13.5 (trixie) | 8.5.0+ds-1+deb13u2 | DEBIAN-CVE-2026-25635 | Feb 6, 2026 |
| calibre · Debian 14 | 9.2.0+ds+~0.10.5-1 | DEBIAN-CVE-2026-25635 | Feb 6, 2026 |
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