{"id":"CVE-2021-32840","aliases":["GHSA-m22m-h4rf-pwq3"],"url":"https://o3.security/vulnerability/CVE-2021-32840","summary":"Path Traversal in SharpZipLib","details":"SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Prior to version 1.3.3, a TAR file entry `../evil.txt` may be extracted in the parent directory of `destFolder`. This leads to arbitrary file write that may lead to code execution. The vulnerability was patched in version 1.3.3.","published":"2022-01-26T21:15:13.097Z","modified":"2026-07-09T01:06:53.169803Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"NuGet","name":"SharpZipLib","fixedVersion":"1.3.3"}],"fix":{"url":"https://github.com/icsharpcode/SharpZipLib/commit/a0e96de70b5264f4c919b09253b1522bc7a221cc","label":"icsharpcode/SharpZipLib@a0e96de"},"references":[{"type":"ADVISORY","url":"https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3"},{"type":"FIX","url":"https://github.com/icsharpcode/SharpZipLib/commit/a0e96de70b5264f4c919b09253b1522bc7a221cc"},{"type":"EVIDENCE","url":"https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T01:06:53.169803Z"}}