fix(deps): update dependency @backstage/backend-defaults to ^0.12.0 [security]#220
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This PR contains the following updates:
^0.11.0→^0.12.0Backstage has a Possible SSRF when reading from allowed URL's in
backend.reading.allowCVE-2026-24048 / GHSA-q2x5-4xjx-c6p9
More information
Details
Impact
The
FetchUrlReadercomponent, 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 inbackend.reading.allowto 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-defaultsversion 0.12.2, 0.13.2, 0.14.1, and 0.15.0. Users should upgrade to this version or later.Workarounds
backend.reading.allowto only trusted hosts that you control and that do not issue redirectsReferences
Severity
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:NReferences
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:
debug:logaction by creating a symlink pointing to sensitive files (e.g.,/etc/passwd, configuration files, secrets)fs:deleteaction by creating symlinks pointing outside the workspaceThis affects any Backstage deployment where users can create or execute Scaffolder templates.
Patches
This vulnerability is fixed in the following package versions:
@backstage/backend-defaultsversion 0.12.2, 0.13.2, 0.14.1, 0.15.0@backstage/plugin-scaffolder-backendversion 2.2.2, 3.0.2, 3.1.1@backstage/plugin-scaffolder-nodeversion 0.11.2, 0.12.3Users should upgrade to these versions or later.
Workarounds
References
Severity
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:LReferences
This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).
Release Notes
backstage/backstage (@backstage/backend-defaults)
v0.12.2Compare Source
v0.12.1Compare Source
Patch Changes
33bd4d0: Deduplicate discovered features discovered with discoveryFeatureLoader4eda590: Fixed cache namespace and key prefix separator configuration to properly use configured values instead of hardcoded plugin ID. The cache manager now correctly combines the configured namespace with plugin IDs using the configured separator for Redis and Valkey. Memcache and memory store continue to use plugin ID as namespace.f244e61: Addbackend.loggerconfig options to configure theRootLoggerService.Read more about the new configuration options in the
Root Logger Service
documentation.
Updated dependencies
v0.12.0Compare Source
Minor Changes
133519b: feat: new cache managerInfinispan Data GridPatch Changes
caee2eb: Fixed WinstonLogger throwing when redactions were null or undefineded74af5: Fixed bug in PackageDiscoveryService where packages with "exports" field caused ERR_PACKAGE_PATH_NOT_EXPORTED error during backend startup.3a7dad9: Updatedbetter-sqlite3to v12Configuration
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