CVE-2026-26065: critical vulnerability in kovidgoyal calibre
calibre: Path Traversal can Lead to Arbitrary File Write and Potential Code Execution
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 0.6%
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
Affected products
kovidgoyal · calibreRelated CVEs — kovidgoyal calibre
In the same product, most dangerous first.
CVE-2026-26064CRITICALcalibre: Path Traversal Vulnerability Enables Arbitrary File Write and Remote Code ExecutionEPSS 1.0%CVE-2026-25635HIGHcalibre has a Path Traversal Leading to Arbitrary File Write and Potential Code ExecutionEPSS 0.5%CVE-2026-73249HIGHcalibre Content Server `/book-update-annotations` Missing Write Authorization Check Allows Unauthorized Annotation ModificationEPSS 0.4%CVE-2026-25731HIGHCalibre Affected by Arbitrary Code Execution via Server-Side Template Injection in Calibre HTML ExportEPSS 0.3%CVE-2026-27810MEDIUMcalibre Vulnerable to HTTP Response Header InjectionEPSS 0.2%CVE-2026-25636HIGHcalibre has a Path Traversal Leading to Arbitrary File Corruption and Code ExecutionEPSS 0.2%