CVE-2026-25635HIGH 8.6EPSS p34.8%

CVE-2026-25635CVE-2026-25635

Description

calibre is an e-book manager. Prior to 9.2.0, Calibre's CHM reader contains a path traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions. On Windows (haven't tested on other OS's), this can lead to Remote Code Execution by writing a payload to the Startup folder, which executes on next login. This vulnerability is fixed in 9.2.0.

Scoring

CVSS 3.18.6 (HIGH)
VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS0.44% probability of exploitation · percentile 34.8% · 2026-06-19T12:03:05Z
Published2026-02-06
Last modified2026-02-17

Underlying weaknesses· 1

CWE-22

References

  1. https://github.com/kovidgoyal/calibre/commit/9739232fcb029ac15dfe52ccd4fdb4a07ebb6ce9
  2. https://github.com/kovidgoyal/calibre/security/advisories/GHSA-32vh-whvh-9fxr
  3. https://0x5t.raptx.org/posts/calibre-chm-rce

1

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

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.