Backstage up to 0.16.0/0.17.7 @backstage/backend-defaults access control

Summaryinfo

A vulnerability, which was classified as critical, was found in Backstage up to 0.16.0/0.17.7. This issue affects some unknown processing of the component @backstage/backend-defaults. Executing a manipulation can lead to access control. This vulnerability is tracked as CVE-2026-106492. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Backstage up to 0.16.0/0.17.7. It has been declared as critical. This vulnerability affects some unknown functionality of the component @backstage/backend-defaults. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths. This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for. This issue is fixed in versions 0.16.1 and 0.17.8.

The advisory is available at github.com. This vulnerability was named CVE-2026-106492 since 10/06/2026. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 0.16.1 or 0.17.8 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

• Backstage

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16.0
• 0.17.0
• 0.17.1
• 0.17.2
• 0.17.3
• 0.17.4
• 0.17.5
• 0.17.6
• 0.17.7

Website

• Product: https://github.com/backstage/backstage/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion