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.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/openmcdf/openmcdf/commit/24f445a557fc4f46461cf6d02d296cce16c293a0 Patch
- https://github.com/openmcdf/openmcdf/security/advisories/GHSA-jxpf-xq2m-q525 Exploit, Vendor Advisory
- https://github.com/openmcdf/openmcdf/security/advisories/GHSA-jxpf-xq2m-q525 Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.5 · openmcdfNVD modified 2026-10-26 18:10
Affected (CPE criteria) 1
cpe:2.3:a:openmcdf:openmcdf:*:*:*:*:*:*:*:*
References 4
- https://github.com/openmcdf/openmcdf/commit/24f445a557fc4f46461cf6d02d296cce16c293a0 Patch
- https://github.com/openmcdf/openmcdf/releases/tag/v3.1.3 Release Notes
- https://github.com/openmcdf/openmcdf/security/advisories/GHSA-jxpf-xq2m-q525 Exploit, Vendor Advisory
- https://github.com/openmcdf/openmcdf/security/advisories/GHSA-jxpf-xq2m-q525 Exploit, Vendor Advisory