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 9, Red Hat Discovery 2.

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

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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 9; Red Hat Discovery 2; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Hardened Images.

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

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

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 13 days ago·verify at source

Fixed versions

tar-2:1.35-13.el10_2
tar-2:1.34-13.el9_8
discovery/discovery-server-rhel9:1788205779
RHSA-2026:61586
RHSA-2026:61581
RHSA-2026:61783

Official advisory · high-confidence parse· fetched 13 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 13 days ago·verify at source

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

Validate CVE metadata against the authoritative registries.

CVE-2026-5704NVD CVE.org MITRE

Discussion(0)

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