Report: CVE-2026-41511 - OpenMcdf has an Infinite loop DoS via crafted CFB directory cycle
CVE ID :CVE-2026-41511 Published : May 8, 2026, 7:16 p.m. | 21 minutes ago 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. Severity: 6.2 | MEDIUM Visit the link for more details, such as CVSS details, affected products, timeline, and more...