CVE-2026-41511

EUVD-2026-28813
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.
Infinite Loop
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.2 MEDIUM
LOCAL
LOW
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 8%
Affected Products (NVD)
VendorProductVersion
openmcdfopenmcdf
𝑥
< 3.1.3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/openmcdf/openmcdf/commit/24f445a557fc4f46461cf6d02d296cce16c293a0
https://github.com/openmcdf/openmcdf/releases/tag/v3.1.3
https://github.com/openmcdf/openmcdf/security/advisories/GHSA-jxpf-xq2m-q525
https://github.com/openmcdf/openmcdf/security/advisories/GHSA-jxpf-xq2m-q525