Detections
Analytics

SCA: security update for @backstage/backend-defaults (GHSA-q2x5-4xjx-c6p9)

low Tenable Self-Hosted Container Security Plugin ID 436876

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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 you control and that do not issue redirects,
 ensure allowed hosts do not have open redirect vulnerabilities, and/or use network-level controls to block
 access from Backstage to sensitive internal endpoints. (CVE-2026-24048)

See Also

https://github.com/advisories/GHSA-q2x5-4xjx-c6p9

Plugin Details

Severity: Low

ID: 436876

Version: Revision 1.14

Type: Local

Family: SCA Checks

Published: 1/22/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Low

CVSS v2

Risk Factor: Low

Base Score: 2.6

Temporal Score: 1.9

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2026-24048

CVSS v3

Risk Factor: Low

Base Score: 3.7

Temporal Score: 3.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 1/21/2026

Vulnerability Publication Date: 1/21/2026

Reference Information

CVE: CVE-2026-24048

cwe: CWE-918