Vulnerability Monitor

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CVE-2026-5704

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.0, requiring local system access to exploit with relatively low complexity though user interaction is required requiring only low-level privileges . The vulnerability impacts integrity (unauthorized modifications), for affected systems. Impacting 3 products from gnu, from redhat, from redhat organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2026, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2026-04-06T16:16:42.140

Last Modified

2026-10-26T22:10:00.163

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.0 (MEDIUM)

Weaknesses

Type: Secondary
CWE-434

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	gnu	tar	-	Yes
Application	redhat	hardened_images	-	Yes
Operating System	redhat	enterprise_linux	6.0	Yes
Operating System	redhat	enterprise_linux	7.0	Yes
Operating System	redhat	enterprise_linux	8.0	Yes
Operating System	redhat	enterprise_linux	9.0	Yes
Operating System	redhat	enterprise_linux	10.0	Yes

References

https://access.redhat.com/errata/RHSA-2026:61581 ([email protected])
https://access.redhat.com/errata/RHSA-2026:61586 ([email protected])
https://access.redhat.com/errata/RHSA-2026:61783 ([email protected])
https://access.redhat.com/errata/RHSA-2026:66018 ([email protected])
https://access.redhat.com/errata/RHSA-2026:66514 ([email protected])
https://access.redhat.com/errata/RHSA-2026:70390 ([email protected])
https://access.redhat.com/security/cve/CVE-2026-5704 Third Party Advisory ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=2455360 Exploit, Issue Tracking, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2026/04/11/10 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2026/04/11/11 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2026/04/12/2 Exploit, Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For gnu's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.