CVE-2026-18508 | A flaw was found in GNU tar. When extracting an archive with the --one-top-level option, hardlink targets are not confined to the designated top-level directory and may resolve relative to the extraction working directory. A crafted archive can create hardlinks that escape the intended boundary and, when combined with a preexisting symbolic link under the working directory, may allow writing outside that boundary during a single extraction.
A flaw was found in GNU tar. When extracting an archive with the --one-top-level option, hardlink targets are not confined to the designated top-level directory and may resolve relative to the extraction working directory. A crafted archive can create hardlinks that escape the intended boundary and, when combined with a preexisting symbolic link under the working directory, may allow writing outside that boundary during a single extraction.
- 🔗 access.redhat.com/errata/RHSA-2026:50807
- 🔗 access.redhat.com/errata/RHSA-2026:61581
- 🔗 access.redhat.com/errata/RHSA-2026:61586
- 🔗 access.redhat.com/errata/RHSA-2026:61783
- 🔗 access.redhat.com/errata/RHSA-2026:66018
- 🔗 access.redhat.com/errata/RHSA-2026:70390
- 🔗 access.redhat.com/security/cve/CVE-2026-18508
- 🔗 bugzilla.redhat.com/show_bug.cgi
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CVE-2026-18508 | A flaw was found in GNU tar. When extracting an archive with the --one-top-level option, hardlink targets are not confined to the designated top-level directory and may resolve relative to the extraction working directory. A crafted archive can create hardlinks that escape the intended boundary and, when combined with a preexisting symbolic link under the working directory, may allow writing outside that boundary during a single extraction.
A flaw was found in GNU tar. When extracting an archive with the --one-top-level option, hardlink targets are not confined to the designated top-level directory and may resolve relative to the extraction working directory. A crafted archive
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