Assessment
Why it matters
EPSS is 0.1%; technical severity is CVSS 4.4.
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.
Who should care
- Teams operating Tar, Enterprise Linux, Openshift Container Platform
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Tar, Enterprise Linux, Openshift Container Platform is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Red Hat Security advisory RHSA-2026:50807
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CWE
- CWE-59
- Affected versions
- GNU Tar (Version 1.35); Redhat Enterprise Linux (Version 8.0 | Version 9.0 | Version 10.0); Redhat Openshift Container Platform (Version 4.0)
- Fixed versions
- No explicit fixed version is currently recorded.
- Published
- 3 August 2026
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Required
Signal timeline
- CVE published
- Latest EPSS score: 0.1%
- Signal calculated at 8