CVE-2026-41511: CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') in ironfede openmcdf
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.
AI Analysis
Technical Summary
OpenMcdf is a .NET/C# library for manipulating Compound File Binary Format files. Versions before 3.1.3 do not detect cyclic references in the directory entry red-black tree structure of CFB files. When a maliciously crafted CFB file contains a cycle in the LeftSiblingID/RightSiblingID pointers, calls to Storage.EnumerateEntries() or Storage.OpenStream() result in an infinite loop, causing the calling thread to hang indefinitely. This vulnerability is classified as CWE-835 (Loop with Unreachable Exit Condition). The infinite loop leads to denial of service by exhausting the thread's execution without the possibility of recovery through exception handling. The vulnerability has been patched in openmcdf version 3.1.3.
Potential Impact
The vulnerability causes denial of service by making the affected functions enter an infinite loop when processing a specially crafted CFB file with cyclic directory entries. This results in the calling thread being consumed indefinitely, potentially causing application hangs or crashes. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade to openmcdf version 3.1.3 or later, where this issue has been fixed. Patch status is confirmed by the vendor's versioning information. No other mitigations are specified or required.
CVE-2026-41511: CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') in ironfede openmcdf
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.
CVSS v3.1
Score 6.2medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OpenMcdf is a .NET/C# library for manipulating Compound File Binary Format files. Versions before 3.1.3 do not detect cyclic references in the directory entry red-black tree structure of CFB files. When a maliciously crafted CFB file contains a cycle in the LeftSiblingID/RightSiblingID pointers, calls to Storage.EnumerateEntries() or Storage.OpenStream() result in an infinite loop, causing the calling thread to hang indefinitely. This vulnerability is classified as CWE-835 (Loop with Unreachable Exit Condition). The infinite loop leads to denial of service by exhausting the thread's execution without the possibility of recovery through exception handling. The vulnerability has been patched in openmcdf version 3.1.3.
Potential Impact
The vulnerability causes denial of service by making the affected functions enter an infinite loop when processing a specially crafted CFB file with cyclic directory entries. This results in the calling thread being consumed indefinitely, potentially causing application hangs or crashes. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
Upgrade to openmcdf version 3.1.3 or later, where this issue has been fixed. Patch status is confirmed by the vendor's versioning information. No other mitigations are specified or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-20T18:18:50.681Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fe3432cbff5d86101a14dc
Added to database: 05/08/2026, 19:06:26 UTC
Last enriched: 05/16/2026, 10:49:34 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 105
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