SCA: security update for @backstage/plugin-scaffolder-backend (GHSA-g2v8-7jhw-pp8p)

critical Tenable Cloud Security Plugin ID 473670

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 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the
@backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder.
An authenticated Backstage user who can read another user's Scaffolder task may receive internal execution
data. In deployments where that data contains credentials for an external service, this may permit
disclosure and unauthorized changes in that external service. This issue is fixed in versions 3.3.1,
3.4.1, 4.0.3 and 4.1.0. (CVE-2026-106501)

Solution

Update the @backstage/plugin-scaffolder-backend library and its related packages to version 3.3.1 or later.

See Also

https://github.com/advisories/GHSA-g2v8-7jhw-pp8p

Plugin Details

Severity: Critical

ID: 473670

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/7/2026

Updated: 10/7/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.8

Percentile: 58.02

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N

CVSS Score Source: CVE-2026-106501

CVSS v3

Risk Factor: Critical

Base Score: 9.6

Temporal Score: 8.3

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/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-2026-106501