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Vulnerability record · CVE-2026-26065 · published 20 February 2026

CVE-2026-26065: Calibre-ebook calibre path traversal vulnerability

Calibre Ebook · Calibre

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below are vulnerable to Path Traversal through PDB readers (both 132-byte and 202-byte header variants) that allow arbitrary file writes with arbitrary extension and arbitrary content anywhere the user has write permissions. Files are written in 'wb' mode, silently overwriting existing files. This can lead to potential code execution and Denial of Service through file corruption. This issue has been fixed in version 9.3.0.

9.3 CVSS 4.0 Critical EPSS 0.56% · top 55.9% CWE-22 · Path traversal
9.3CVSS 4.0 base score
0.56%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below are vulnerable to Path Traversal through PDB readers (both 132-byte and 202-byte header variants) that allow arbitrary file writes with arbitrary extension and arbitrary content anywhere the user has write permissions. Files are written in 'wb' mode, silently overwriting existing files. This can lead to potential code execution and Denial of Service through file corruption. This issue has been fixed in version 9.3.0.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/kovidgoyal/calibre/commit/b6da1c3878c06eb1356cb0ec1106cb66e0e9bfb8 Patch
https://github.com/kovidgoyal/calibre/security/advisories/GHSA-vmfh-7mr7-pp2w ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2011-4124Calibre-ebook calibre improper input validation vulnerabilityInput validation issues were found in Calibre at devices/linux_mount_helper.c which can lead to argument injection and elevation of privileges.EPSS 2.3%9.8CVE-2011-4125Calibre-ebook calibre untrusted search path vulnerabilityA untrusted search path issue was found in Calibre at devices/linux_mount_helper.c leading to the ability of unprivileged users to execute any progra…EPSS 2.3%9.3CVE-2026-26064Calibre-ebook calibre path traversal vulnerabilitycalibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below contain a Path Traversa…EPSS 0.85%8.6CVE-2026-25635Calibre-ebook calibre path traversal vulnerabilitycalibre 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…EPSS 0.36%8.2CVE-2026-33206Calibre-ebook calibre relative path traversal vulnerabilitycalibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to version 9.6.0, a path traversal vulnera…EPSS 0.22%8.2CVE-2026-30853Calibre-ebook calibre path traversal vulnerabilitycalibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Prior to 9.5.0, a path traversal vulnerability i…EPSS 0.19%8.1CVE-2011-4126Calibre-ebook calibre toctou race condition vulnerabilityRace condition issues were found in Calibre at devices/linux_mount_helper.c allowing unprivileged users the ability to mount any device to anywhere.EPSS 1.5%7.8CVE-2026-25731Calibre-ebook calibre vulnerabilitycalibre is an e-book manager. Prior to 9.2.0, a Server-Side Template Injection (SSTI) vulnerability in Calibre's Templite templating engine allows ar…EPSS 0.26%

Source: NIST National Vulnerability Database (record CVE-2026-26065), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.