CVE-2026-30853HIGH 8.2EPSS p7.6%

CVE-2026-30853CVE-2026-30853

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. This vulnerability is fixed in 9.5.0.

Scoring

CVSS 3.18.2 (HIGH)
VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H
EPSS0.18% probability of exploitation · percentile 7.6% · 2026-06-19T12:03:05Z
Published2026-03-13
Last modified2026-03-18

Underlying weaknesses· 1

CWE-22

References

  1. https://github.com/kovidgoyal/calibre/security/advisories/GHSA-7mp7-rfrg-542x

1

TypeTargetConfidenceTier
WeaknessImproper Limitation of a Pathname to a Restricted Directory ('Path Traversal')cwe-220%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2026-26065
CVE
CVE-2026-25635
CVE
CVE-2026-26064
CVE
CVE-2025-7404
CVE
Adobe Acrobat and Reader Out-of-Bounds Write Vulnerability
CVE
CVE-2026-30292
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.