CVE-2026-41511— OpenMcdf has an Infinite loop DoS via crafted CFB directory cycle
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-41511
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
OpenMcdf has an Infinite loop DoS via crafted CFB directory cycle
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenMcdf 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenMcdf是OpenMcdf开源的一个用于操作复合文件二进制格式的.NET库。 OpenMcdf 3.1.3之前版本存在安全漏洞，该漏洞源于未检测目录条目红黑树中的循环，可能导致无限循环。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-41511
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-41511
请登录查看更多情报信息。
- Release v3.1.3 · openmcdf/openmcdf · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-41511
IV. Related Vulnerabilities
Same weakness: CWE-835
- CVE-2026-42310
Pillow: PDF Parsing Trailer Infinite Loop (DoS) - CVE-2026-5407
Loop with Unreachable Exit Condition ('Infinite Loop') in Wi - CVE-2026-6536
Loop with Unreachable Exit Condition ('Infinite Loop') in Wi - CVE-2026-6534
Loop with Unreachable Exit Condition ('Infinite Loop') in Wi - CVE-2026-6531
Loop with Unreachable Exit Condition ('Infinite Loop') in Wi
V. Comments for CVE-2026-41511
No comments yet