CVE-2026-41511: OpenMcdf has an Infinite loop DoS via crafted CFB directory cycle
OpenMcdf does not detect cycles in the directory entry red-black tree of a Compound File Binary (CFB) document. A crafted CFB file with a cycle in the LeftSiblingID / RightSiblingID chain causes Storage.EnumerateEntries() and Storage.OpenStream() to loop indefinitely, consuming the calling thread with no possibility of recovery via try/catch.
References
- github.com/advisories/GHSA-jxpf-xq2m-q525
- github.com/openmcdf/openmcdf
- github.com/openmcdf/openmcdf/commit/24f445a557fc4f46461cf6d02d296cce16c293a0
- github.com/openmcdf/openmcdf/releases/tag/v3.1.3
- github.com/openmcdf/openmcdf/security/advisories/GHSA-jxpf-xq2m-q525
- nvd.nist.gov/vuln/detail/CVE-2026-41511
Code Behaviors & Features
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