medium6.2
CVE-2026-41511
OpenMcdf is a fully .NET / C# library to manipulate Compound File Binary File Format files, also known as Structured Storage.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | OpenMcdf | < 3.1.3 | 3.1.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Openmcdf | Openmcdf | before 3.1.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-jxpf-xq2m-q525
- https://github.com/openmcdf/openmcdf/security/advisories/GHSA-jxpf-xq2m-q525
- https://github.com/openmcdf/openmcdf/commit/24f445a557fc4f46461cf6d02d296cce16c293a0
- https://github.com/openmcdf/openmcdf/releases/tag/v3.1.3
- https://nvd.nist.gov/vuln/detail/CVE-2026-41511