Sylabs Singularity/SingularityPRO prior 4.4.2/4.3.9/4.1.14 Path Validation singularity.conf access control

Summaryinfo

A vulnerability, which was classified as very critical, has been found in Sylabs Singularity and SingularityPRO. The impacted element is an unknown function of the file singularity.conf of the component Path Validation. The manipulation leads to access control. This vulnerability is traded as CVE-2026-47215. An attack has to be approached locally. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Sylabs Singularity and SingularityPRO. It has been rated as very critical. This issue affects an unknown functionality of the file singularity.conf of the component Path Validation. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

SingularityCE and SingularityPRO are open source container platforms. Prior to SingularityCE 4.4.2 and SingularityPRO 4.3.9 and 4.1.14, incorrect path-string matching in the singularity.conf limit container paths directive allows a container in a sibling directory such as /data/safe-but-unsafe to be run when /data/safe is allowed under setuid mode. This permits a user to run a container from outside the administrator's configured path allowlist. Installations that do not use limit container paths are not affected. This issue is fixed in SingularityCE 4.4.2 and SingularityPRO 4.3.9 and 4.1.14.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-47215 since 05/19/2026. The exploitation is known to be easy. Attacking locally is a requirement. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/15/2026). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Upgrading to version 4.4.2, 4.3.9 or 4.1.14 eliminates this vulnerability.

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Productinfo

Vendor

• Sylabs

Name

• Singularity
• SingularityPRO

Website

• Product: https://github.com/sylabs/singularity/

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