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Vulnerability details: VCID-x63d-4kux-cqcu
Vulnerability ID VCID-x63d-4kux-cqcu
Aliases CVE-2026-26064
Summary calibre is a cross-platform e-book manager for viewing, converting, editing, and cataloging e-books. Versions 9.2.1 and below contain a Path Traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions. On Windows, this leads to Remote Code Execution by writing a payload to the Startup folder, which executes on next login. Function extract_pictures only checks startswith('Pictures'), and does not sanitize '..' sequences. calibre's own ZipFile.extractall() in utils/zipfile.py does sanitize '..' via _get_targetpath(), but extract_pictures() bypasses this by using manual zf.read() + open(). This issue has been fixed in version 9.3.0.
Status Published
Exploitability 0.5
Weighted Severity 8.4
Risk 4.2
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
System Score Found at
epss 0.00067 https://api.first.org/data/v1/epss?cve=CVE-2026-26064
epss 0.00067 https://api.first.org/data/v1/epss?cve=CVE-2026-26064
epss 0.00067 https://api.first.org/data/v1/epss?cve=CVE-2026-26064
epss 0.00067 https://api.first.org/data/v1/epss?cve=CVE-2026-26064
epss 0.00067 https://api.first.org/data/v1/epss?cve=CVE-2026-26064
epss 0.00067 https://api.first.org/data/v1/epss?cve=CVE-2026-26064
epss 0.00067 https://api.first.org/data/v1/epss?cve=CVE-2026-26064
epss 0.00067 https://api.first.org/data/v1/epss?cve=CVE-2026-26064
cvssv4 9.3 https://github.com/kovidgoyal/calibre/commit/e1b5f9b45a5e8fa96c136963ad9a1d35e6adac62
ssvc Track https://github.com/kovidgoyal/calibre/commit/e1b5f9b45a5e8fa96c136963ad9a1d35e6adac62
cvssv4 9.3 https://github.com/kovidgoyal/calibre/security/advisories/GHSA-72ch-3hqc-pgmp
ssvc Track https://github.com/kovidgoyal/calibre/security/advisories/GHSA-72ch-3hqc-pgmp
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-26064
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-26064
e1b5f9b45a5e8fa96c136963ad9a1d35e6adac62 https://github.com/kovidgoyal/calibre/commit/e1b5f9b45a5e8fa96c136963ad9a1d35e6adac62
GHSA-72ch-3hqc-pgmp https://github.com/kovidgoyal/calibre/security/advisories/GHSA-72ch-3hqc-pgmp
No exploits are available.
Vector: 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 Found at https://github.com/kovidgoyal/calibre/commit/e1b5f9b45a5e8fa96c136963ad9a1d35e6adac62
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

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high

none

passive

active

high

low

none

high

low

none

high

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low

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Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-02-20T15:29:11Z/ Found at https://github.com/kovidgoyal/calibre/commit/e1b5f9b45a5e8fa96c136963ad9a1d35e6adac62
Vector: 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 Found at https://github.com/kovidgoyal/calibre/security/advisories/GHSA-72ch-3hqc-pgmp
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-02-20T15:29:11Z/ Found at https://github.com/kovidgoyal/calibre/security/advisories/GHSA-72ch-3hqc-pgmp
Exploit Prediction Scoring System (EPSS)
Percentile 0.20787
EPSS Score 0.00067
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T16:39:25.680660+00:00 Debian Oval Importer Import https://www.debian.org/security/oval/oval-definitions-bullseye.xml.bz2 38.0.0