Detections
Analytics
SCA: security update for @backstage/plugin-auth-backend (GHSA-wqvh-63mv-9w92)
medium Tenable Self-Hosted Container Security Plugin ID 438692
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. Prior to 0.27.1, the experimental OIDC
provider in @backstage/plugin-auth-backend is vulnerable to a redirect URI allowlist bypass. Instances
that have enabled experimental Dynamic Client Registration or Client ID Metadata Documents and configured
allowedRedirectUriPatterns are affected. A specially crafted redirect URI can pass the allowlist
validation while resolving to an attacker-controlled host. If a victim approves the resulting OAuth
consent request, their authorization code is sent to the attacker, who can exchange it for a valid access
token. This requires victim interaction and that one of the experimental features is explicitly enabled,
which is not the default. This vulnerability is fixed in 0.27.1. (CVE-2026-32235)
Solution
Update the @backstage/plugin-auth-backend library and its related packages to version 0.27.1 or later.See Also
Plugin Details
Severity: Medium
ID: 438692
Version: Revision 1.10
Type: Local
Family: SCA Checks
Published: 3/12/2026
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 2.3
Percentile: 9.42
Vendor
Vendor Severity: Medium
CVSS v2
Risk Factor: Medium
Base Score: 4
Temporal Score: 3
Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:N
CVSS Score Source: CVE-2026-32235
CVSS v3
Risk Factor: Medium
Base Score: 4.7
Temporal Score: 4.1
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/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: 3/12/2026
Vulnerability Publication Date: 3/12/2026
Reference Information
CVE: CVE-2026-32235