{"id":"CVE-2026-44788","aliases":["GHSA-6c8g-7p36-r338"],"url":"https://o3.security/vulnerability/CVE-2026-44788","summary":"SharpCompress: Directory traversal via directory entries in WriteToDirectory (zip slip variant)","details":"SharpCompress is a fully managed C# library to deal with many compression types and formats. In 0.47.4 and earlier, a path traversal vulnerability in IArchive.WriteToDirectory() allows a malicious archive to create directories outside the intended extraction root. For TAR archives, this can be escalated to arbitrary file writes by chaining with a symlink entry, giving a full write primitive on the target filesystem subject to the permissions of the running process.","published":"2026-05-26T21:32:00.845Z","modified":"2026-07-27T03:56:25.165447632Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"NuGet","name":"SharpCompress","fixedVersion":"0.48.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44788.json"},{"type":"ADVISORY","url":"https://github.com/adamhathcock/sharpcompress/security/advisories/GHSA-6c8g-7p36-r338"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44788"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-27T03:56:25.165447632Z"}}