جزئیات آسیب‌پذیری

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.

• https://github.com/backstage/backstage/security/advisories/GHSA-rq6q-wr2q-7pgp x_refsource_CONFIRM
• https://github.com/backstage/backstage/commit/c641c147ab371a9a8a2f5f67fdb7cb9c97ef345d x_refsource_MISC
• https://access.redhat.com/security/cve/CVE-2026-24046 vdb-entryx_refsource_REDHAT
• https://bugzilla.redhat.com/show_bug.cgi?id=2431878 issue-trackingx_refsource_REDHAT
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24046.json x_sadp-csaf-vex
• https://access.redhat.com/errata/RHSA-2026:6174 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:6802 vendor-advisoryx_refsource_REDHAT