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CVE-2026-18508 Tar: tar: --one-top-level hardlink targets not confined to top-level directory enabling arbitrary file overwrite

🗓️ 03 Aug 2026 14:51:41Reported by redhatType 
cvelist
 cvelist🔗 www.cve.org👁 140 Views

GNU tar flaw: --one-top-level hardlinks escape top directory, enabling arbitrary overwrite.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ibm
IBM Security Bulletins		Security Bulletin: Multiple Vulnerabilities in IBM Operator for PostgreSQL
3 Sep 202623:55
–ibm
attackerkb
ATTACKERKB		CVE-2026-18508
3 Aug 202614:51
–attackerkb
nessus
Tenable Nessus		AlmaLinux 9 : tar (ALSA-2026:61581)
1 Sep 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 10 : tar (ALSA-2026:61586)
2 Sep 202600:00
–nessus
nessus
Tenable Nessus		CentOS 9 : tar-1.34-13.el9
26 Aug 202600:00
–nessus
nessus
Tenable Nessus		Fedora 44 : tar (2026-044e56d9ff)
9 Sep 202600:00
–nessus
nessus
Tenable Nessus		Fedora 45 : tar (2026-ee1eb89e7b)
11 Sep 202600:00
–nessus
nessus
Tenable Nessus		MiracleLinux 9 : tar-1.34-13.el9_8 (AXSA:2026-1733:03)
2 Sep 202600:00
–nessus
nessus
Tenable Nessus		Oracle Linux 9 : ELSA-2026-61581-0: / tar (ELSA-2026-615810)
2 Sep 202600:00
–nessus
nessus
Tenable Nessus		Oracle Linux 10 : ELSA-2026-61586-0: / tar (ELSA-2026-615860)
3 Sep 202600:00
–nessus
Rows per page
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10 Sep 2026 17:23Current
CVSS 3.14.4
EPSS0.00141
CWE-59
gnu tarone top levelhardlinks escapearbitrary overwriteextraction vulnerability
140