Skip to content

fix(deps): update dependency @backstage/backend-defaults to ^0.12.0 [security]#85

Open
renovate[bot] wants to merge 1 commit intomainfrom
renovate/npm-backstage-backend-defaults-vulnerability
Open

fix(deps): update dependency @backstage/backend-defaults to ^0.12.0 [security]#85
renovate[bot] wants to merge 1 commit intomainfrom
renovate/npm-backstage-backend-defaults-vulnerability

Conversation

@renovate
Copy link
Contributor

@renovate renovate bot commented Jan 21, 2026

This PR contains the following updates:

Package Change Age Confidence
@backstage/backend-defaults (source) ^0.7.0^0.12.0 age confidence

GitHub Vulnerability Alerts

CVE-2026-24046

Impact

Multiple Scaffolder actions and archive extraction utilities were vulnerable to symlink-based path traversal attacks. An attacker with access to create and execute Scaffolder templates could exploit symlinks to:

  1. Read arbitrary files via the debug:log action by creating a symlink pointing to sensitive files (e.g., /etc/passwd, configuration files, secrets)
  2. Delete arbitrary files via the fs:delete action by creating symlinks pointing outside the workspace
  3. Write files outside the workspace via archive extraction (tar/zip) containing malicious symlinks

This affects any Backstage deployment where users can create or execute Scaffolder templates.

Patches

This vulnerability is fixed in the following package versions:

  • @backstage/backend-defaults version 0.12.2, 0.13.2, 0.14.1, 0.15.0
  • @backstage/plugin-scaffolder-backend version 2.2.2, 3.0.2, 3.1.1
  • @backstage/plugin-scaffolder-node version 0.11.2, 0.12.3

Users should upgrade to these versions or later.

Workarounds

  • Follow the recommendation in the Backstage Threat Model to limit access to creating and updating templates
  • Restrict who can create and execute Scaffolder templates using the permissions framework
  • Audit existing templates for symlink usage
  • Run Backstage in a containerized environment with limited filesystem access

References

CVE-2026-24048

Impact

The FetchUrlReader component, used by the catalog and other plugins to fetch content from URLs, followed HTTP redirects automatically. This allowed an attacker who controls a host listed in backend.reading.allow to redirect requests to internal or sensitive URLs that are not on the allowlist, bypassing the URL allowlist security control.

This is a Server-Side Request Forgery (SSRF) vulnerability that could allow access to internal resources, but it does not allow attackers to include additional request headers.

Patches

This vulnerability is fixed in @backstage/backend-defaults version 0.12.2, 0.13.2, 0.14.1, and 0.15.0. Users should upgrade to this version or later.

Workarounds

  • Restrict backend.reading.allow to only trusted hosts that you control and that do not issue redirects
  • Ensure allowed hosts do not have open redirect vulnerabilities
  • Use network-level controls to block access from Backstage to sensitive internal endpoints

References


Release Notes

backstage/backstage (@​backstage/backend-defaults)

v0.12.2

Compare Source

v0.12.1

Compare Source

Patch Changes

v0.12.0

Compare Source

Minor Changes
  • 133519b: feat: new cache manager Infinispan Data Grid
Patch Changes

v0.11.1

Compare Source

Patch Changes

v0.11.0

Compare Source

Minor Changes
  • 3ccb7fc: Enhanced error handling in the auditor service factory to pass errors as objects. Aligned WinstonRootAuditorService with the default service factory's error handling.
Patch Changes

v0.10.0

Compare Source

Minor Changes
  • d385854: BREAKING: The DefaultSchedulerService constructor options now requires RootLifecycleService, HttpRouterService, and PluginMetadataService fields.

    The scheduler will register a REST API for listing and triggering tasks. Please see the scheduler documentation for more details about this API.

Patch Changes

v0.9.0

Compare Source

Minor Changes
  • 1daedce: Remove Throttle of Bitbucket Server API calls
  • 01edf6e: Allow pass through of redis client and cluster options to Cache core service
  • cf4eb13: Added actor property to BackstageUserPrincipal containing the subject of the last service (if any) who performed authentication on behalf of the user.
Patch Changes

v0.8.2

Compare Source

Patch Changes

v0.8.1

Compare Source

Release a newer version of @backstage/techdocs-common including a bug fix #​4088.

v0.8.0

Compare Source

Minor Changes
  • a4aa244: This change introduces the auditor service implementation details.
Patch Changes

Configuration

📅 Schedule: Branch creation - "" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.


  • If you want to rebase/retry this PR, check this box

This PR was generated by Mend Renovate. View the repository job log.

@renovate renovate bot force-pushed the renovate/npm-backstage-backend-defaults-vulnerability branch from 7c20620 to f044b44 Compare February 2, 2026 16:01
@renovate renovate bot force-pushed the renovate/npm-backstage-backend-defaults-vulnerability branch from f044b44 to bdc606c Compare February 12, 2026 12:30
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

None yet

Projects

None yet

Development

Successfully merging this pull request may close these issues.

0 participants