CVE-2026-105080: CWE-829 Inclusion of Functionality from Untrusted Control Sphere in C4illin ConvertX
Description
ConvertX versions before 0.19.0 contain a critical vulnerability (CVE-2026-105080) where recipe files are not blocked and are passed directly to the Calibre ebook-convert program. This allows inclusion of functionality from untrusted control spheres via executable code in .recipe or .downloaded_recipe files.
CVSS v4.0
Score 9.4critical
Affected software
C4illin
ConvertX
pkg:github/c4illin/ConvertXRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-105080 affects ConvertX prior to version 0.19.0. The vulnerability arises because converters/calibre.ts does not block recipe files and instead forwards them to the Calibre ebook-convert program. This behavior allows potentially malicious executable code embedded in .recipe or .downloaded_recipe files to be executed, representing an inclusion of functionality from an untrusted control sphere (CWE-829). The CVSS 4.0 score is 9.4 (critical), indicating high attack vector and impact metrics.
Potential Impact
An attacker can exploit this vulnerability by supplying crafted .recipe or .downloaded_recipe files that contain executable code. This can lead to execution of arbitrary code within the context of the ebook-convert program, potentially compromising the system running ConvertX. The vulnerability requires no user interaction and has low attack complexity with privileges required at the level of a limited user.
Mitigation Recommendations
A fix is available in ConvertX version 0.19.0 and later. Users should upgrade to version 0.19.0 or above to remediate this vulnerability. No vendor advisory content was provided to indicate alternative mitigations or temporary fixes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-10-03T00:39:27.941Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac05773a43b0b3b894462b5
Added to database: 10/03/2026, 01:16:35 UTC
Last enriched: 10/10/2026, 20:55:54 UTC
Last updated: 10/11/2026, 18:57:27 UTC
Views: 136
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.