CVE-2026-106459

Backstage is an open framework for building developer portals. From 0.3.0 until 0.3.8, the @backstage/plugin-scaffolder-backend-module-sentry package is affected by improper input validation in sentry scaffolder actions. An authenticated internal user who can execute the affected actions may cause the backend to contact unintended destinations and disclose Sentry integration credentials. Subsequent impact depends on network reachability and the privileges granted to the configured token. This issue is fixed in version 0.3.8.

CVSS 3.1

8.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 11% of CVEs (scores of 2026-10-25)

CWEs

CWE-200, CWE-918

Published

2026-10-06

Modified

2026-10-13

Record from

the NVD, synced 2026-10-19

Affected

• linuxfoundation:backstage
• linuxfoundation:backstage\/plugin-scaffolder-backend-module-sentry

Packages (OSV)

References

• https://github.com/backstage/backstage/commit/b0170fad7962fb8c3d71366b5265cf283c7bbcf7
• https://github.com/backstage/backstage/releases/tag/v1.54.8
• https://github.com/backstage/backstage/releases/tag/v1.55.0
• https://github.com/backstage/backstage/security/advisories/GHSA-g734-fhp4-7mfp

Check your stackJSON