CVE-2025-64486: critical vulnerability in kovidgoyal calibre
calibre is vulnerable to arbitrary code execution when opening FB2 files
Published · Updated
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28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.3epss 0.2%
calibre is an e-book manager. In versions 8.13.0 and prior, calibre does not validate filenames when handling binary assets in FB2 files, allowing an attacker to write arbitrary files on the filesystem when viewing or converting a malicious FictionBook file. This can be leveraged to achieve arbitrary code execution. This issue is fixed in version 8.14.0.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/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-2026-26065CRITICALcalibre: Path Traversal can Lead to Arbitrary File Write and Potential Code ExecutionEPSS 0.6%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%