Skip to content

Update dependency @backstage/backend-defaults to ^0.12.0 [SECURITY]#7348

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

Update dependency @backstage/backend-defaults to ^0.12.0 [SECURITY]#7348
backstage-goalie[bot] wants to merge 1 commit into
mainfrom
renovate/npm-backstage-backend-defaults-vulnerability

Conversation

@backstage-goalie
Copy link
Copy Markdown
Contributor

@backstage-goalie backstage-goalie Bot commented Jan 29, 2026

This PR contains the following updates:

Package Change Age Confidence
@backstage/backend-defaults (source) ^0.11.1^0.12.0 age confidence
@backstage/backend-defaults (source) ^0.7.0^0.12.0 age confidence

Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.


Backstage has a Possible SSRF when reading from allowed URL's in backend.reading.allow

CVE-2026-24048 / GHSA-q2x5-4xjx-c6p9

More information

Details

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

Severity

  • CVSS Score: 3.5 / 10 (Low)
  • Vector String: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N

References

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).


Backstage has a Possible Symlink Path Traversal in Scaffolder Actions

CVE-2026-24046 / GHSA-rq6q-wr2q-7pgp

More information

Details

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

Severity

  • CVSS Score: 7.1 / 10 (High)
  • Vector String: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:L

References

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).


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

Configuration

📅 Schedule: (UTC)

  • Branch creation
    • ""
  • 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 these updates again.


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

This PR has been generated by Mend Renovate.

Loading
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Projects

None yet

Development

Successfully merging this pull request may close these issues.

4 participants