CVE-2026-24048
3.5 · LOWOverview
CVE-2026-24048 is a low-severity vulnerability affecting linuxfoundation backstage\/backend_defaults. It was published on January 21, 2026 and has a CVSS 3.1 base score of 3.5 (LOW).
This vulnerability has a CVSS 3.1 base score of 3.5, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical Description
Backstage is an open framework for building developer portals, and @backstage/backend-defaults provides the default implementations and setup for a standard Backstage backend app. Prior to versions 0.12.2, 0.13.2, 0.14.1, and 0.15.0, 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. 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. Some workarounds are available. Restrict `backend.reading.allow` to only trusted hosts that y
Remediation
Check the references section for vendor advisories and patches from linuxfoundation. Update backstage\/backend_defaults to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| linuxfoundation | backstage\/backend_defaults | >= 0, < 0.12.2 | Affected |
Frequently Asked Questions
What is CVE-2026-24048?
CVE-2026-24048 is a low-severity vulnerability affecting linuxfoundation backstage\/backend_defaults. It was published on January 21, 2026 and has a CVSS 3.1 base score of 3.5 (LOW).
How severe is CVE-2026-24048?
This vulnerability has a CVSS 3.1 base score of 3.5, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-24048?
Check the references section for vendor advisories and patches from linuxfoundation. Update backstage\/backend_defaults to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-24048?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-24048 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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