VulnerabilityPublished 6 Apr 2026Updated 22 Sep 2026

CVE-2026-5704: Red Hat Enterprise Linux 10 · Unrestricted File Upload

Affects Red Hat Enterprise Linux 10Source CVE Database V5

Compare

Not known to be exploited · CVSS 5.0 Medium.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score

5.0Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 37% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N

Attack Vector: Local
Attack Complexity: Low
Privileges Required: Low
User Interaction: Required
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 6 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Red Hat Enterprise Linux 10tar	Affected–	Fixed in–
Red Hat Enterprise Linux 8tar	Affected–	Fixed in–
Red Hat Enterprise Linux 9tar	Affected–	Fixed in–
Red Hat Discovery 2discovery/discovery-server-rhel9	Affected–	Fixed in–
Red Hat Hardened Imagestar-main	Affected–	Fixed in–
Red Hat Update Infrastructure 5rhui5/cds-kubernetes-rhel9	Affected–	Fixed in–

AI-suggested

Until an official fix is available, exercise caution when extracting archives from untrusted sources and consider additional inspection or sandboxing measures. No vendor-provided mitigation or temporary fix is currently documented.

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.

Impact

The vulnerability allows an attacker with local access and user interaction to inject malicious files into the system by bypassing inspection mechanisms during archive extraction. This impacts system integrity by potentially introducing unauthorized or malicious files. There is no direct impact on confidentiality or availability reported. No known exploits are currently in the wild.

Summary

This vulnerability in tar on Red Hat Enterprise Linux 10 involves the unrestricted upload of files with dangerous types via crafted archives. An attacker can exploit this by creating a malicious archive that injects hidden files with fully attacker-controlled content, circumventing pre-extraction inspection controls. The CVSS 3.1 vector indicates local attack vector with low complexity, requiring low privileges and user interaction, impacting integrity but not confidentiality or availability. The vendor advisory does not provide explicit remediation or patch details at this time.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 29 Jul 2026, 21:35 UTC

Technical details

References

Community reviews

Related threats