Detections
Analytics
SCA: security update for @backstage/plugin-auth-backend-module-cloudflare-access-provider (GHSA-q333-f498-w2x7)
medium Tenable Cloud Security Plugin ID 473806
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. From 0.1.0 until 0.5.0, the
@backstage/plugin-auth-backend-module-cloudflare-access-provider package is affected by insufficient
audience validation in the cloudflare access auth provider. The Cloudflare Access auth provider verifies a
token's signature and team issuer, but affected versions do not verify that the token was issued for the
Backstage application. A user holding a valid token for another Access application in the same Cloudflare
Zero Trust team may therefore be able to authenticate to Backstage if that token reaches the auth endpoint
without the Backstage application's audience already being enforced upstream. Cloudflare Access normally
evaluates the protected application before forwarding requests. This issue is fixed in version 0.5.0.
(CVE-2026-106457)
Solution
Update the @backstage/plugin-auth-backend-module-cloudflare-access-provider library and its related packages to version 0.5.0 or later.See Also
Plugin Details
Severity: Medium
ID: 473806
Version: Revision 1.1
Type: Local
Family: SCA Checks
Published: 10/8/2026
Updated: 10/8/2026
Risk Information
VPR
Risk Factor: Medium
Score: 4.3
Percentile: 53.48
Vendor
Vendor Severity: Medium
CVSS v2
Risk Factor: Medium
Base Score: 6.6
Temporal Score: 4.9
Vector: CVSS2#AV:N/AC:H/Au:S/C:C/I:C/A:N
CVSS Score Source: CVE-2026-106457
CVSS v3
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5.9
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/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: 10/7/2026
Vulnerability Publication Date: 10/6/2026
Reference Information
CVE: CVE-2026-106457
cwe: CWE-287