calibre: calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books
CVE-2026-30853 is fixed in calibre on 1 platform, first by DEBIAN-CVE-2026-30853, released March 13, 2026. It is not reported as exploited. Patch Radar priority: High.
calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to 9.5.0, a path traversal vulnerability in the RocketBook (.rb) input plugin (src/calibre/ebooks/rb/reader.py) allows an attacker to write arbitrary files to any path writable by the calibre process when a user opens or converts a crafted .rb file. This is the same bug class fixed in CVE-2026-26065 for the PDB readers, but the fix was never applied to the RB reader. This vulnerability is fixed in 9.5.0.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| calibre · Debian 12.15 (bookworm) | 6.13.0+repack-2+deb12u8 | DEBIAN-CVE-2026-30853 | Mar 13, 2026 |
| calibre · Debian 13.5 (trixie) | 8.5.0+ds-1+deb13u3 | DEBIAN-CVE-2026-30853 | Mar 13, 2026 |
| calibre · Debian 14 | 9.5.0+ds+~0.10.5-1 | DEBIAN-CVE-2026-30853 | Mar 13, 2026 |
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