CVE-2026-30853
calibre has a Path Traversal Leading to Arbitrary File Write
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 5EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
13 Mar 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L
Affected products
kovidgoyal · calibreWant to know if your infrastructure is exposed to this?
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