{"id":"CVE-2026-41511","summary":"OpenMcdf has an Infinite loop DoS via crafted CFB directory cycle","details":"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.","aliases":["GHSA-jxpf-xq2m-q525"],"modified":"2026-07-15T01:48:58.711280842Z","published":"2026-05-08T18:52:39.438Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-835"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41511.json"},"references":[{"type":"WEB","url":"https://github.com/openmcdf/openmcdf/releases/tag/v3.1.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41511.json"},{"type":"ADVISORY","url":"https://github.com/openmcdf/openmcdf/security/advisories/GHSA-jxpf-xq2m-q525"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41511"},{"type":"FIX","url":"https://github.com/openmcdf/openmcdf/commit/24f445a557fc4f46461cf6d02d296cce16c293a0"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openmcdf/openmcdf","events":[{"introduced":"0"},{"fixed":"fd0775c58134848a587424c4a9d6c2403f628e19"},{"fixed":"24f445a557fc4f46461cf6d02d296cce16c293a0"}],"database_specific":{"cpe":"cpe:2.3:a:openmcdf:openmcdf:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"3.1.3"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v3.1.2","v3.1.1","v3.1.0","v3.0.3","v3.0.2-alpha.1","v3.0.2","v3.0.1","v3.0.0","v3.0.0-preview.5","v3.0.0-preview.4","v3.0.0-preview.3","v3.0.0-preview.2","v3.0.0-preview.1","v2.3.1.0","v2.3.0.0","v2.2.1.9","v2.2.1.6","v2.2.1.5","v2.2.1.4","v2.2.1.3","v2.2.1.2","v2.1.6.28924","v2.1.5.22659","v2.1.4.23498","v2.1.3.34730","v2.1.3.34720","v2.1.2.1274","v2.1.1.29598"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-41511.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}