Description
A flaw was found in tar. A remote attacker could exploit this vulnerability by crafting a malicious archive, leading to hidden file injection with fully attacker-controlled content. This bypasses pre-extraction inspection mechanisms, potentially allowing an attacker to introduce malicious files onto a system without detection.
Affected products
gnu: tar; redhat: hardened images; redhat: enterprise linux
References10
- bugzilla.redhat.com/show_bug.cgi?id=2455360 ExploitIssue TrackingThird Party Advisory
- www.openwall.com/lists/oss-security/2026/04/11/10 ExploitMailing ListThird Party Advisory
- www.openwall.com/lists/oss-security/2026/04/12/2 ExploitMailing ListThird Party Advisory
- access.redhat.com/errata/RHSA-2026:61581
- access.redhat.com/errata/RHSA-2026:61586
- access.redhat.com/errata/RHSA-2026:61783
- access.redhat.com/errata/RHSA-2026:66018
- access.redhat.com/errata/RHSA-2026:66514
- access.redhat.com/errata/RHSA-2026:70390
- access.redhat.com/security/cve/CVE-2026-5704 Third Party Advisory
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N - EPSS — exploit probability
- 0% percentile: 41 · as of 12 November 2026
- CWE
- CWE-434
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.