Medium severity6.2NVD Advisory· Published May 8, 2026· Updated Jun 5, 2026
CVE-2026-41511
CVE-2026-41511
Description
OpenMcdf is a fully .NET / C# library to manipulate Compound File Binary File Format files, also known as Structured Storage. Prior to version 3.1.3, 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. This issue has been patched in version 3.1.3.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
OpenMcdfNuGet | < 3.1.3 | 3.1.3 |
Affected products
2Patches
Vulnerability mechanics
References
5- github.com/openmcdf/openmcdf/commit/24f445a557fc4f46461cf6d02d296cce16c293a0nvdPatchWEB
- github.com/openmcdf/openmcdf/security/advisories/GHSA-jxpf-xq2m-q525nvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-jxpf-xq2m-q525ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-41511ghsaADVISORY
- github.com/openmcdf/openmcdf/releases/tag/v3.1.3nvdRelease NotesWEB
News mentions
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