CVE-2026-63499: zt-zip: ZipUtil.unpack can change file permissions of output directory
When using one of the ZipUtil.unpack overloads, the file permissions of the output directory can be changed. For example, when the output directory was only accessible to the ‘owner’ it could be instead made accessible to every OS user.
References
- github.com/advisories/GHSA-v2g6-7r9j-v6px
- github.com/zeroturnaround/zt-zip/commit/1b625467b4c3cd3a9bee9efc35bdef2f8d9c8dad
- github.com/zeroturnaround/zt-zip/pull/191
- github.com/zeroturnaround/zt-zip/releases/tag/v1.18.1
- github.com/zeroturnaround/zt-zip/security/advisories/GHSA-v2g6-7r9j-v6px
- nvd.nist.gov/vuln/detail/CVE-2026-63499
Code Behaviors & Features
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