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Medium severity4.4NVD Advisory· Published Aug 3, 2026· Updated Sep 10, 2026

CVE-2026-18508

CVE-2026-18508

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

7
  • GNU/Tar2 versions
    cpe:2.3:a:gnu:tar:1.35:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:gnu:tar:1.35:*:*:*:*:*:*:*
    • (no CPE)
  • Red Hat/Openshift Container Platform
    cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
  • Red Hat/Enterprise Linux Server3 versions
    cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
    • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
    • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
  • osv-coords
    pkg:rpm/almalinux/tar
    Range: < 2:1.34-13.el9_8

Patches

Vulnerability mechanics

References

7

News mentions

1