GHSA-3xr5-8w6c-p5gwPublished

Backstage: Improper access control in backend action invocation

Exact source revision recorded 24 Oct 2026 13:17:17 UTC. It does not establish the source's current position. Latest evidence.

Recorded JSON

osv · GHSA-3xr5-8w6c-p5gw

Published

### Impact An authenticated user could invoke actions that an operator had excluded through action configuration. Existing action permissions and downstream authorization remain enforced. ### Patches Patched in `@backstage/backend-defaults` version `0.17.8` ### Workarounds Limit access to action invocation endpoints to trusted service callers until upgrading.

Source published: 15 Oct 2026 20:21:54 UTC
Source modified: 15 Oct 2026 20:30:06 UTC
Observed here: 24 Oct 2026 13:17:17 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Publisher rating · MODERATE