PT-2026-42030 · Nuget+2 · Openmcdf
CVE-2026-45785
·
Published
2026-05-19
·
Updated
2026-07-23
CVSS v3.1
6.2
Medium
| Vector | AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
OpenMcdf versions prior to 3.1.4
Description
A denial of service occurs when processing a specially crafted Compound File Binary (CFB) file. The issue resides in the BST name-lookup loop within the
DirectoryTree.TryGetDirectoryEntry() function, which repeatedly calls directories.TryGetSibling(child, siblingType, validateColor). If a CFB file contains cyclic Left/Right sibling links that satisfy the BST-order check in TryGetSibling(), the while (child is not null) loop runs indefinitely because there is no cycle detection in DirectoryTree.TryGetDirectoryEntry(). This behavior is triggered when using the following functions:RootStorage.OpenStorage(name)RootStorage.TryOpenStorage(name)RootStorage.OpenStream(name)RootStorage.TryOpenStream(name)
Recommendations
Update to version 3.1.4.
Exploit
Fix
DoS
Infinite Loop
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Weakness Enumeration
Related Identifiers
Affected Products
Openmcdf