{"answers":{"affected":"2 open source packages ship an affected version, including OpenMcdf.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45785 exists.","fix":"Upgrade OpenMcdf to 3.1.4 or later.","what":"CVE-2026-45785 is a medium-severity denial of service vulnerability in openmcdf, published on 17 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-45785 and fix it if it is affected.\n\nWhat it is: CVE-2026-45785 is a medium-severity denial of service vulnerability in openmcdf, published on 17 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-45785 exists.\n\nAffected packages and fixed versions:\n- OpenMcdf (NuGet): affected all versions; fixed in 3.1.4\n- OpenMcdf (NuGet): affected all versions; fixed in 3.1.4\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-45785/ (Markdown: https://insights.sbomify.com/CVE-2026-45785/index.md)","id":"CVE-2026-45785","markdown":"https://insights.sbomify.com/CVE-2026-45785/index.md","name":"CVE-2026-45785","record":{"aliases":["GHSA-5qwm-7pvp-w988"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"CFB file library","requires_auth":"none","summary":"Attackers can cause an infinite loop and denial of service in OpenMcdf by providing a crafted Compound File Binary file with cyclic directory entries.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":6.2,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-835","name":"Loop with Unreachable Exit Condition"}],"description":"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.","ecosystems":["NuGet"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"OpenMcdf: Uncatchable infinite loop in DirectoryTree.TryGetDirectoryEntry on crafted CFB directory cycle","id":"CVE-2026-45785","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"electerm's encrypt method not safe enough","id":"CVE-2026-45787"},"packages":[{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["0"],"last_affected":[],"package":"OpenMcdf","purl":null,"source":"GHSA-5qwm-7pvp-w988"},{"ecosystem":"NuGet","fixed":["3.1.4"],"introduced":["0"],"last_affected":[],"package":"OpenMcdf","purl":"pkg:nuget/OpenMcdf","source":"GHSA-5qwm-7pvp-w988"}],"prev":{"headline":"rust-openssl: Potential out-of-bounds write in `CipherCtxRef::cipher_update_inplace` for AES-KW-PAD ciphers","id":"CVE-2026-45784"},"products":["openmcdf"],"published":"2026-07-17","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-21","vendors":["openmcdf"]},"summary":"Attackers can cause an infinite loop and denial of service in OpenMcdf by providing a crafted Compound File Binary file with cyclic directory entries.","url":"https://insights.sbomify.com/CVE-2026-45785/"}