CVE-2026-25635: high-severity vulnerability in kovidgoyal calibre
calibre has a Path Traversal Leading to Arbitrary File Write and Potential Code Execution
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.6epss 0.5%
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:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A: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-2026-26065CRITICALcalibre: Path Traversal can Lead to Arbitrary File Write and Potential Code ExecutionEPSS 0.6%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%