Advisory severityMedium5.0Red Hat Linux

Medium [CVE-2026-5704] hidden file injection via crafted archives

This medium-severity Red Hat Linux advisory covers CVE-2026-5704 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-5704 Source published Apr 6, 2026Source updated Apr 6, 2026

VulniPulse record published Jul 28, 2026

CVE-2026-5704

Affected products & platforms

Red Hat LinuxRed Hat Enterprise Linux

Open source advisory

Summary

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. Red Hat severity: Moderate — CVSS 5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N).

Weakness: CWE-434. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Discovery 2; Red Hat Hardened Images; Red Hat Update Infrastructure 5; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.

Red Hat fixing advisory: RHSA-2026:61586, RHSA-2026:70390, RHSA-2026:61581, RHSA-2026:61783, RHSA-2026:66514, RHSA-2026:66018.

Affected products named by the advisory: Red Hat package: tar.

Is CVE-2026-5704 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-5704 is not in the CISA KEV catalog (checked Nov 10, 2026) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-5704?

Upgrade to a fixed release named by Red Hat:

tar-2:1.35-13.el10_2
tar-2:1.30-13.el8_10
tar-2:1.34-13.el9_8
discovery/discovery-server-rhel9:1788205779
tar-main-1.35-10.hum1
rhui5/cds-kubernetes-rhel9:1788880445
rhui5/cds-rhel9:1788880464
rhui5/haproxy-rhel9:1788880456
rhui5/installer-rhel9:1788765051
rhui5/rhua-rhel9:1788880581
RHSA-2026:61586
RHSA-2026:70390

4 more fixed releases are listed below.

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Fixed versions

tar-2:1.35-13.el10_2
tar-2:1.30-13.el8_10
tar-2:1.34-13.el9_8
discovery/discovery-server-rhel9:1788205779
tar-main-1.35-10.hum1
rhui5/cds-kubernetes-rhel9:1788880445
rhui5/cds-rhel9:1788880464
rhui5/haproxy-rhel9:1788880456
rhui5/installer-rhel9:1788765051
rhui5/rhua-rhel9:1788880581
RHSA-2026:61586
RHSA-2026:70390
RHSA-2026:61581
RHSA-2026:61783
RHSA-2026:66514
RHSA-2026:66018

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

To mitigate this issue, avoid extracting archives from untrusted sources. If processing untrusted archives is necessary, do so within a sandboxed environment to limit potential impact.

Official advisory · high-confidence parse· fetched 7 days ago·verify at source

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Sources

Official and corroborating records used to build this advisory.

Red Hat Security Data APIofficial
Official vendor source used to discover this advisory; it remains the authority for affected products and remediation. Discovered from the machine-readable feed https://access.redhat.com/hydra/rest/securitydata/cve.json; this link opens the Red Hat Linux advisory index instead of the raw feed document.
Red Hat Linux
Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Red Hat Linux
CVE.org CNA affected-product recordCVE.org
Structured CNA affected[] data independently confirmed the affected product scope; native advisory content remains authoritative.
CVE Program

Cross-references

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CVE-2026-5704NVD CVE.org MITRE

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Medium [CVE-2026-5704] hidden file injection via crafted archives

Summary

Is CVE-2026-5704 exploited?

How do I fix CVE-2026-5704?

Affected versions

Mitigation checklist

Get an email when Red Hat RHEL & SELinux publishes the next one.

More Red Hat Linux advisories

Monitor future Red Hat Linux CVEs from your phone.

Discussion(0)