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    4 vulnerabilities by openmcdf

    CVE-2026-45785 (GCVE-0-2026-45785)

    Vulnerability from nvd – Published: 2026-07-17 20:37 – Updated: 2026-07-21 02:20
    VLAI
    Title
    OpenMcdf: Uncatchable infinite loop in DirectoryTree.TryGetDirectoryEntry on crafted CFB directory cycle
    Summary
    OpenMcdf is a fully .NET / C# library to manipulate Compound File Binary File Format files, also known as Structured Storage. In 3.1.3 and earlier, the BST name-lookup loop in DirectoryTree.TryGetDirectoryEntry (OpenMcdf/DirectoryTree.cs:35-46) walks directory entries by repeatedly calling directories.TryGetSibling(child, siblingType, validateColor). A crafted CFB file with cyclic Left/Right sibling links among directory entries, constructed so the per-step BST-order check in TryGetSibling (DirectoryEntries.cs:84-85) is satisfied at every step, drives this while (child is not null) loop forever. There is no cycle detection in TryGetDirectoryEntry, and the bug is reachable from RootStorage.OpenStorage(name), TryOpenStorage(name), OpenStream(name), and TryOpenStream(name), causing an unrecoverable denial of service. This issue is fixed in version 3.1.4.
    Severity
    6.2 (Medium)
    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
    Assigner
    References
    Impacted products
    Vendor Product Version
    openmcdf openmcdf Affected: < 3.1.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-41511 (GCVE-0-2026-41511)

    Vulnerability from nvd – Published: 2026-05-08 18:52 – Updated: 2026-05-11 18:45
    VLAI
    Title
    OpenMcdf has an Infinite loop DoS via crafted CFB directory cycle
    Summary
    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)
    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
    Assigner
    References
    Impacted products
    Vendor Product Version
    ironfede openmcdf Affected: < 3.1.3
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-45785 (GCVE-0-2026-45785)

    Vulnerability from cvelistv5 – Published: 2026-07-17 20:37 – Updated: 2026-07-21 02:20
    VLAI
    Title
    OpenMcdf: Uncatchable infinite loop in DirectoryTree.TryGetDirectoryEntry on crafted CFB directory cycle
    Summary
    OpenMcdf is a fully .NET / C# library to manipulate Compound File Binary File Format files, also known as Structured Storage. In 3.1.3 and earlier, the BST name-lookup loop in DirectoryTree.TryGetDirectoryEntry (OpenMcdf/DirectoryTree.cs:35-46) walks directory entries by repeatedly calling directories.TryGetSibling(child, siblingType, validateColor). A crafted CFB file with cyclic Left/Right sibling links among directory entries, constructed so the per-step BST-order check in TryGetSibling (DirectoryEntries.cs:84-85) is satisfied at every step, drives this while (child is not null) loop forever. There is no cycle detection in TryGetDirectoryEntry, and the bug is reachable from RootStorage.OpenStorage(name), TryOpenStorage(name), OpenStream(name), and TryOpenStream(name), causing an unrecoverable denial of service. This issue is fixed in version 3.1.4.
    Severity
    6.2 (Medium)
    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
    Assigner
    References
    Impacted products
    Vendor Product Version
    openmcdf openmcdf Affected: < 3.1.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-41511 (GCVE-0-2026-41511)

    Vulnerability from cvelistv5 – Published: 2026-05-08 18:52 – Updated: 2026-05-11 18:45
    VLAI
    Title
    OpenMcdf has an Infinite loop DoS via crafted CFB directory cycle
    Summary
    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)
    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
    Assigner
    References
    Impacted products
    Vendor Product Version
    ironfede openmcdf Affected: < 3.1.3
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/openmcdf/openmcdf/security/advisories/GHSA-jxpf-xq2m-q525",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/openmcdf/openmcdf/security/advisories/GHSA-jxpf-xq2m-q525"
        },
        {
          "name": "https://github.com/openmcdf/openmcdf/commit/24f445a557fc4f46461cf6d02d296cce16c293a0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openmcdf/openmcdf/commit/24f445a557fc4f46461cf6d02d296cce16c293a0"
        },
        {
          "name": "https://github.com/openmcdf/openmcdf/releases/tag/v3.1.3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openmcdf/openmcdf/releases/tag/v3.1.3"
        }
      ],
      "source": {
        "advisory": "GHSA-jxpf-xq2m-q525",
        "discovery": "UNKNOWN"
      },
      "title": "OpenMcdf has an Infinite loop DoS via crafted CFB directory cycle"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-41511",
    "datePublished": "2026-05-08T18:52:39.438Z",
    "dateReserved": "2026-04-20T18:18:50.681Z",
    "dateUpdated": "2026-05-11T18:45:06.128Z",
    "state": "PUBLISHED"
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}