CVE-2026-24046 (GCVE-0-2026-24046)
Vulnerability from cvelistv5
Published
2026-01-21 22:36
Modified
2026-01-22 16:49
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
Backstage is an open framework for building developer portals. 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 read arbitrary files via the `debug:log` action by creating a symlink pointing to sensitive files (e.g., `/etc/passwd`, configuration files, secrets); delete arbitrary files via the `fs:delete` action by creating symlinks pointing outside the workspace, and 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. This vulnerability is fixed in `@backstage/backend-defaults` versions 0.12.2, 0.13.2, 0.14.1, and 0.15.0; `@backstage/plugin-scaffolder-backend` versions 2.2.2, 3.0.2, and 3.1.1; and `@backstage/plugin-scaffolder-node` versions 0.11.2 and 0.12.3. Users should upgrade to these versions or later. Some workarounds are available. 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, and/or run Backstage in a containerized environment with limited filesystem access.
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| backstage | backstage |
Version: @backstage/backend-defaults < 0.12.2 Version: @backstage/backend-defaults >= 0.13.0, < 0.13.2 Version: @backstage/backend-defaults >= 0.14.0, < 0.14.1 Version: @backstage/plugin-scaffolder-backend < 2.2.2 Version: @backstage/plugin-scaffolder-backend >= 3.0.0, < 3.0.2 Version: @backstage/plugin-scaffolder-backend >= 3.1.0, < 3.1.1 Version: @backstage/plugin-scaffolder-node < 0.11.2 Version: @backstage/plugin-scaffolder-node >= 0.12.0, < 0.12.3 |
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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