Vulnerabilities CVE-2026-41511

CVE-2026-41511

Medium

Open

TLP:CLEAR

OpenMcdf has an Infinite loop DoS via crafted CFB directory cycle

NVD CVE.org

Critical Infrastructure

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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.

Details

CVSS Score: 6.2
EPSS Score ⓘ: 0.19%

8.5th percentile
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence: 90%
Published: May 8, 2026
Last Modified: May 8, 2026

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