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CVE-2026-106486

8.5 · HIGH

Backstage is an open framework for building developer portals.

Published Oct 6, 2026linuxfoundationCWE-22EPSS 0.37%

Overview

CVE-2026-106486 is a high-severity vulnerability affecting linuxfoundation backstage\/plugin-scaffolder-backend-module-bitbucket-cloud. It was published on October 6, 2026 and has a CVSS 3.1 base score of 8.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Backstage is an open framework for building developer portals. Prior to 0.3.10 in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud and 0.2.25 in @backstage/plugin-scaffolder-backend-module-bitbucket-server, the Bitbucket pull-request Scaffolder actions did not sufficiently validate filesystem paths. An authenticated user who can execute an eligible template and influence an allowed Bitbucket repository could affect paths outside the expected working area, potentially compromising backend confidentiality, integrity, or availability. This issue is fixed in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud 0.3.10 and @backstage/plugin-scaffolder-backend-module-bitbucket-server 0.2.25.

Remediation

Check the references section for vendor advisories and patches from linuxfoundation. Update backstage\/plugin-scaffolder-backend-module-bitbucket-cloud to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
linuxfoundationbackstage\/plugin-scaffolder-backend-module-bitbucket-cloud>= 0, < 0.3.10Affected
linuxfoundationbackstage\/plugin-scaffolder-backend-module-bitbucket-server>= 0, < 0.2.25Affected
linuxfoundationbackstage>= 0, < 1.54.6Affected

References

GitHubgithub.com/backstage/backstage/commit/818528e112c36167d76187e9e63fb518399c4dd2GitHubgithub.com/backstage/backstage/releases/tag/v1.54.6GitHubgithub.com/backstage/backstage/security/advisories/GHSA-g8rx-f7m5-7794

How CyberStrike helps

Frequently asked questions

What is CVE-2026-106486?

CVE-2026-106486 is a high-severity vulnerability affecting linuxfoundation backstage\/plugin-scaffolder-backend-module-bitbucket-cloud. It was published on October 6, 2026 and has a CVSS 3.1 base score of 8.5 (HIGH).

How severe is CVE-2026-106486?

This vulnerability has a CVSS 3.1 base score of 8.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-106486?

Check the references section for vendor advisories and patches from linuxfoundation. Update backstage\/plugin-scaffolder-backend-module-bitbucket-cloud to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-106486?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-106486 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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