CVE-2026-18508
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
34/100
Published: 2026-08-03
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Low Complexity
No Auth
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
None
UI:
Required
S:
Unchanged
C:
Low
I:
Low
A:
None
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.
Weakness Classification (1)
Affected Software (5)
| Vendor | Product | Version |
|---|---|---|
| gnu | tar | 1.35 |
| redhat | enterprise_linux | 8.0 |
| redhat | enterprise_linux | 9.0 |
| redhat | enterprise_linux | 10.0 |
| redhat | openshift_container_platform | 4.0 |
References & Advisories (8)
Vendor Advisory
Vendor Advisory
Issue Tracking
Vendor Advisory