Red Hat Enterprise Linux/yggdrasil-worker-package-manager Apt Backend argument injection

Summaryinfo

A vulnerability, which was classified as very critical, has been found in Red Hat Enterprise Linux and yggdrasil-worker-package-manager. This impacts an unknown function of the component Apt Backend. Performing a manipulation results in argument injection. This vulnerability is reported as CVE-2026-18157. The attack requires a local approach. No exploit exists.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Red Hat Enterprise Linux and yggdrasil-worker-package-manager (affected version unknown). This affects an unknown functionality of the component Apt Backend. The manipulation with an unknown input leads to a argument injection vulnerability. CWE is classifying the issue as CWE-88. The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in yggdrasil-worker-package-manager. A local attacker with existing access to the system could exploit an argument injection vulnerability in the APT backend. This allows specially crafted package names, which begin with a hyphen, to be misinterpreted as command options by apt-get. Successful exploitation could lead to remote code execution (RCE) with root privileges, enabling the attacker to fully compromise the system's integrity, confidentiality, and availability.

It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-18157 since 07/28/2026. The exploitability is told to be easy. Attacking locally is a requirement. Additional levels of successful authentication are required for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/31/2026). The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

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

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Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux
• yggdrasil-worker-package-manager

License

• commercial

Website

• Vendor: https://www.redhat.com/

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