CVEvulnerability
CVE-2026-18508
4.4 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2026-08-03
- Last modified
- 2026-10-30
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 4.4 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- Weaknesses
- CWE-59
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.
Affected configurations
• gnu tar 1.35
• redhat openshift container platform 4.0
• redhat enterprise linux 8.0
• redhat enterprise linux 9.0
• redhat enterprise linux 10.0
Related
Weakness · CWE (1)
- CWE-59 Improper Link Resolution Before File Access weakness
References
- https://access.redhat.com/errata/RHSA-2026:50807 Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:61581 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:61586 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:61783 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:66018 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:70390 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-18508 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2509843 Issue Tracking, Vendor Advisory