CVE-2026-59976

CVSS 8.1 (high) · published 2026-10-12

ConvertX is a self-hosted file conversion service. Prior to 0.18.0, the ImageMagick converter uses the unsanitized convert_to parameter to construct an output path. If an authenticated user, or an unauthenticated user when ConvertX is configured to allow unauthenticated access, uploads an extensionless image and supplies directory traversal sequences in convert_to through /convert, the constructed path escapes the intended output directory, allowing the attacker to write converted output to arbitrary container paths, potentially overwriting files or causing denial of service. This issue is fixed in version 0.18.0.

Weakness: CWE-22, CWE-73

Source: NVD CVE-2026-59976

References

• https://github.com/C4illin/ConvertX/commit/0965928949319e2839770fbf57a8337440d42630
• https://github.com/C4illin/ConvertX/pull/532
• https://github.com/C4illin/ConvertX/releases/tag/v0.18.0
• https://github.com/C4illin/ConvertX/security/advisories/GHSA-pvqw-vc5x-266j
• https://github.com/C4illin/ConvertX/security/advisories/GHSA-pvqw-vc5x-266j

Check your software

Connect an AI agent to the FixLane MCP server or ask the Telegram bot to check what you have installed against incidents with a verified fixed version.