Is CVE-2026-105080 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-105080 being exploited in the wild.

How severe is CVE-2026-105080?

Critical severity, with a CVSS score of 9.9, published 3 October 2026.

Is there a fix for CVE-2026-105080?

Yes: fixed in 0.19.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-105080 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-105080?

Check whether you run ConvertX at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-105080: ConvertX unsafe recipe file handling in Calibre converter

CVE-2026-105080 · Severity: critical · CVSS 9.9 · Published 2026-10-03

ConvertX is a file conversion application that integrates with Calibre for ebook format conversions. Versions before 0.19.0 fail to block malicious recipe files (.recipe and .downloaded_recipe), which are passed directly to Calibre's ebook-convert tool where they can execute arbitrary code. An attacker could exploit this by uploading or providing a specially crafted recipe file, gaining code execution on the server.

Technologies: ConvertX. Vendors: ConvertX.

Quick answers

Is CVE-2026-105080 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-105080 being exploited in the wild.
How severe is CVE-2026-105080?: Critical severity, with a CVSS score of 9.9, published 3 October 2026.
Which products and versions are affected?: ConvertX before 0.19.0.
Is there a fix for CVE-2026-105080?: Yes: fixed in 0.19.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-105080 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-105080?: Check whether you run ConvertX at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 0.19.0

Technical details

The vulnerability exists in converters/calibre.ts, which does not validate or filter recipe file inputs before passing them to the ebook-convert program. Recipe files (.recipe and .downloaded_recipe) can contain executable code that Calibre will interpret during conversion. An attacker with the ability to upload or supply files to ConvertX can achieve remote code execution through a malicious recipe file without authentication or user interaction beyond the file submission.

Affected products

ConvertX ConvertX before 0.19.0

Timeline

2026-10-03: disclosed
2026-09-26: patched

References

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