{"schemaVersion":3,"id":"CVE-2026-30853","aliases":["UBUNTU-CVE-2026-30853","DEBIAN-CVE-2026-30853"],"status":"published","duplicateOf":null,"title":null,"description":"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. 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