CVE-2026-30853 (GCVE-0-2026-30853)

Vulnerability from cvelistv5 – Published: 2026-03-13 19:00 – Updated: 2026-03-13 19:42
VLAI
Title
calibre has a Path Traversal Leading to Arbitrary File Write
Summary
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.
Severity
5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:L
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-13 19:42 UTC
CWE
  • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
kovidgoyal calibre Affected: < 9.5.0
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