CVE-2026-105080

Severity: critical (CVSS 9.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-03 · updated 2026-10-06
Weakness: CWE-829

Description

In ConvertX before 0.19.0, converters/calibre.ts does not block recipe files, and instead passes them to the ebook-convert program from Calibre. This affects executable code in a .recipe or .downloaded_recipe file.

Affected products

C4illin ConvertX: before 0.19.0 — fixed in 0.19.0

How to fix

Upgrade to a fixed version: C4illin ConvertX 0.19.0. Check the vendor advisory for mitigations.

References

https://github.com/C4illin/ConvertX/commit/0ca17dad7fa65e2e34823b59b95dd00bb1066b66
https://github.com/C4illin/ConvertX/releases/tag/v0.19.0
https://github.com/C4illin/ConvertX/security/advisories/GHSA-m4hh-rqmf-c8hw

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