Red Hat Enterprise Linux flatpak-builder information disclosure

Summaryinfo

A vulnerability categorized as problematic has been discovered in Red Hat Enterprise Linux. Affected is an unknown function of the component flatpak-builder. Such manipulation leads to information disclosure. This vulnerability is traded as CVE-2026-107466. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux (affected version unknown). It has been rated as problematic. Affected by this issue is an unknown functionality of the component flatpak-builder. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

A flaw was found in flatpak-builder. This vulnerability allows an attacker to cause information disclosure by convincing a user or continuous integration (CI) system to process a crafted build manifest. By specifying local file Uniform Resource Identifiers (URIs) within source download definitions, the builder bypasses directory confinement checks. As a result, sensitive host files accessible to the build process can be read and incorporated into the build artifacts.

The advisory is shared for download at access.redhat.com. This vulnerability is handled as CVE-2026-107466 since 10/08/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 10/08/2026). The MITRE ATT&CK project declares the attack technique as T1592.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-94800). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux

License

• commercial

Website

• Vendor: https://www.redhat.com/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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