{"affected":[{"product":"zt-zip","source":"CNA: GitHub_M","vendor":"zeroturnaround","versions":[{"status":"affected","version":"< 1.18.0"}]},{"ecosystem":"maven","packageName":"org.zeroturnaround:zt-zip","product":"org.zeroturnaround:zt-zip","source":"GitHub GHSA-52c6-99qm-3hqr","vendor":"","versions":[{"status":"affected","version":"<= 1.17","versionType":"GitHub advisory range"}]}],"cveId":"CVE-2026-63436","cwes":["CWE-22"],"description":"zt-zip is a Java library that provides convenience methods for ZIP archive manipulation. Prior to 1.18.0, the Zips.get(zip).unpack().destination(outputDir).process() fluent API in src/main/java/org/zeroturnaround/zip/Zips.java constructs output files directly from ZIP entry names without applying the destination-boundary validation used by ZipUtil.unpack(...). A crafted entry containing parent-directory traversal can therefore write outside outputDir through both the normal copy branch and the ZipEntryTransformer branch. Applications that extract untrusted archives only through ZipUtil.unpack(...) are unaffected because that API already calls checkDestinationFileForTraversal. This issue is fixed in version 1.18.0.","epss":{"date":"2026-11-09","percentile":0.15373,"score":0.00242},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/zeroturnaround/zt-zip/security/advisories/GHSA-52c6-99qm-3hqr"}],"kev":null,"metrics":[{"score":6.1,"severity":"medium","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L","version":"3.1"},{"score":6.1,"severity":"medium","source":"NVD: security-advisories@github.com","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L","version":"3.1"}],"modifiedAt":1794238292334,"publishedAt":1793728947180,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/zeroturnaround/zt-zip/security/advisories/GHSA-52c6-99qm-3hqr"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/zeroturnaround/zt-zip/pull/180"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/zeroturnaround/zt-zip/commit/59a76ad576b0fcd50ea018e3608afb946c1492fd"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/zeroturnaround/zt-zip/releases/tag/v1.18.0"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/zeroturnaround/zt-zip/security/advisories/GHSA-52c6-99qm-3hqr"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/zeroturnaround/zt-zip/commit/59a76ad576b0fcd50ea018e3608afb946c1492fd"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/zeroturnaround/zt-zip/pull/180"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/zeroturnaround/zt-zip/releases/tag/v1.18.0"},{"source":"security-advisories@github.com","tags":[],"url":"https://github.com/zeroturnaround/zt-zip/security/advisories/GHSA-52c6-99qm-3hqr"},{"source":"GitHub Security Advisories","tags":["advisory"],"url":"https://github.com/zeroturnaround/zt-zip/security/advisories/GHSA-52c6-99qm-3hqr"}],"remediation":[{"kind":"fix","source":"GitHub GHSA-52c6-99qm-3hqr","text":"org.zeroturnaround:zt-zip (maven): GitHub reports patched versions 1.18.0. Check the advisory for the affected release branch.","url":"https://github.com/zeroturnaround/zt-zip/security/advisories/GHSA-52c6-99qm-3hqr"}],"revision":"525b96f49f334320d8099faa839c2ae18fa7ccd6f4703037307f62cc1e0a82c0","sources":[{"modifiedAt":1794238292334,"name":"CNA: GitHub_M","retrievedAt":1794240647541,"url":"https://www.cve.org/CVERecord?id=CVE-2026-63436"},{"modifiedAt":1793729883727,"name":"NVD","retrievedAt":1793751688784,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63436"},{"modifiedAt":1784238470000,"name":"GitHub Security Advisories","retrievedAt":1793818809614,"url":"https://github.com/zeroturnaround/zt-zip/security/advisories/GHSA-52c6-99qm-3hqr"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794240668558,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-63436"}],"ssvc":{"assessedAt":1794238244506,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"zt-zip: Path traversal in fluent API unpack","updatedAt":1794240668558}