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CVE

CVE-2026-26064

calibre: Path Traversal Vulnerability Enables Arbitrary File Write and Remote Code Execution
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CVE

CVE-2026-26064

calibre: Path Traversal Vulnerability Enables Arbitrary File Write and Remote Code Execution

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 extractpictures only checks startswith('Pictures'), and does not sanitize '..' sequences. calibre's own ZipFile.extractall() in utils/zipfile.py does sanitize '..' via gettargetpath(), but extractpictures() bypasses this by using manual zf.read() + open(). This issue has been fixed in version 9.3.0.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
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:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26064.json, https://github.com/kovidgoyal/calibre/commit/e1b5f9b45a5e8fa96c136963ad9a1d35e6adac62, https://github.com/kovidgoyal/calibre/security/advisories/GHSA-72ch-3hqc-pgmp, https://nvd.nist.gov/vuln/detail/CVE-2026-26064

Severity

0

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
0
EPSS Probability
0.00049%
EPSS Percentile
0.15343%
Introduced Version
0
Fix Available
88e00cd8371310c371b5386d12f06b324ce7278e

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