{"id":"CVE-2021-32841","aliases":["GHSA-2x7h-96h5-rq84"],"url":"https://o3.security/vulnerability/CVE-2021-32841","summary":"Path Traversal in SharpZipLib","details":"SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Starting version 1.3.0 and prior to version 1.3.3, a check was added if the destination file is under destination directory. However, it is not enforced that `destDir` ends with slash. If the `destDir` is not slash terminated like `/home/user/dir` it is possible to create a file with a name thats begins with the destination directory, i.e. `/home/user/dir.sh`. Because of the file name and destination directory constraints, the arbitrary file creation impact is limited and depends on the use case. Version 1.3.3 contains a patch for this vulnerability.","published":"2022-01-26T22:15:07.837Z","modified":"2026-07-08T21:27:01.068301Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},"epss":{"score":0.01079,"percentile":0.62477,"asOf":"2026-08-20"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"NuGet","name":"SharpZipLib","fixedVersion":"1.3.3"}],"fix":{"url":"https://github.com/icsharpcode/SharpZipLib/commit/5c3b293de5d65b108e7f2cd0ea8f81c1b8273f78","label":"icsharpcode/SharpZipLib@5c3b293"},"references":[{"type":"ADVISORY","url":"https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3"},{"type":"FIX","url":"https://github.com/icsharpcode/SharpZipLib/commit/5c3b293de5d65b108e7f2cd0ea8f81c1b8273f78"},{"type":"EVIDENCE","url":"https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T21:27:01.068301Z"}}