CVE-2026-25635

HIGH EPSS 35.0%
Published Feb 6, 20264mo ago · Modified Jun 17, 20261w ago
8.6 CVSS 3.1
High
Find Similar
Published Feb 6, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.6
Exploitability
1.8
Impact
6.0
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
35.0% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 1

VendorProductVersionRange
calibre-ebookcalibre* <9.2.0

References 3

  • 0x5t.raptx.org https://0x5t.raptx.org/posts/calibre-chm-rce
    ExploitThird Party Advisory
  • github.com https://github.com/kovidgoyal/calibre/commit/9739232fcb029ac15dfe52ccd4fdb4a07ebb6ce9
    Patch
  • github.com https://github.com/kovidgoyal/calibre/security/advisories/GHSA-32vh-whvh-9fxr
    ExploitThird Party Advisory

Remediation

  • github.com https://github.com/kovidgoyal/calibre/commit/9739232fcb029ac15dfe52ccd4fdb4a07ebb6ce9
    Patch