CVE-2023-42346: Alkacon OpenCms is vulnerable to XXE when the <!DOCTYPE> refers to an external host

May 8, 2026 (updated May 14, 2026)

Alkacon OpenCms before 16 allows XXE when the refers to an external host.

References

github.com/advisories/GHSA-pj6p-9p8x-5mfc
labs.watchtowr.com/xxe-you-can-depend-on-me-opencms
nvd.nist.gov/vuln/detail/CVE-2023-42346

Code Behaviors & Features

Detect and mitigate CVE-2023-42346 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →