CVE-2026-106486

critical

Backstage is an open framework for building developer portals.

Vendor / product: Linuxfoundation — backstage\/plugin-scaffolder-backend-module-bitbucket-cloud

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.

CVSS

9.9

9.9 (CVSS v3.1)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Severity source: NVD CVSS v3.1 (nvd@nist.gov)

Timeline (UTC)

Published: 2026-10-06 21:17

Modified: 2026-10-23 15:01

NVD status: Analyzed

Last synced 2 days ago

Verified against the source API 2026-10-27 06:58 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

linuxfoundation / backstage\/plugin-scaffolder-backend-module-bitbucket-cloud <0.3.10

linuxfoundation / backstage\/plugin-scaffolder-backend-module-bitbucket-server <0.2.25

linuxfoundation / backstage <1.54.6

Weakness classification (CWE)

CWE-22 CWE-59

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Vendor advisory: https://github.com/backstage/backstage/security/advisories/GHSA-g8rx-f7m5-7794

Patch / mitigation: https://github.com/backstage/backstage/commit/818528e112c36167d76187e9e63fb518399c4dd2

Patch / mitigation: https://github.com/backstage/backstage/releases/tag/v1.54.6

Patch / mitigation: https://github.com/backstage/backstage/security/advisories/GHSA-g8rx-f7m5-7794

References

https://github.com/backstage/backstage/commit/818528e112c36167d76187e9e63fb518399c4dd2 security-advisories@github.com
https://github.com/backstage/backstage/releases/tag/v1.54.6 security-advisories@github.com
https://github.com/backstage/backstage/security/advisories/GHSA-g8rx-f7m5-7794 security-advisories@github.com

Data sources

NVD CVE API 2.0 — fetched 2026-10-27 06:58 UTC · record ↗

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CVE-2026-106486

Affected products

Weakness classification (CWE)

Mitigation & advisories

References

Data sources

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