# CVE-2025-64486: calibre: calibre is an e-book manager

CVE-2025-64486 is fixed in calibre on 1 platform, first by DEBIAN-CVE-2025-64486, released November 8, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-64486
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 8, 2025

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | calibre Debian 12.15 (bookworm) | 6.13.0+repack-2+deb12u5 | [DEBIAN-CVE-2025-64486](https://patchblox.com/security/data/fix/linux/debian-cve-2025-64486.md) | Nov 8, 2025 |
| Linux | calibre Debian 13.5 (trixie) | 8.5.0+ds-1+deb13u1 | [DEBIAN-CVE-2025-64486](https://patchblox.com/security/data/fix/linux/debian-cve-2025-64486.md) | Nov 8, 2025 |
| Linux | calibre Debian 14 | 8.14.0+ds+~0.10.5-1 | [DEBIAN-CVE-2025-64486](https://patchblox.com/security/data/fix/linux/debian-cve-2025-64486.md) | Nov 8, 2025 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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