@backstage/plugin-scaffolder-backend: Possible exposure of defaultEnvironment secrets using dry-run endpoint

published 2026-03-12 7 mo ago modified 2026-06-17 4 mo ago also GHSA-8wq8-6859-qx77 , EUVD-2026-11675

cvss: 4.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits: 0; none known

Backstage is an open framework for building developer portals. Prior to 3.1.5, authenticated users with permission to execute scaffolder dry-runs can gain access to server-configured environment secrets through the dry-run API response. Secrets are properly redacted in log output but not in all parts of the response payload. Deployments that have configured scaffolder.defaultEnvironment.secrets are affected. This is patched in @backstage/plugin-scaffolder-backend version 3.1.5.

Patch / fix

fixed in 2 links 1

npm @backstage/plugin-scaffolder-backend 3.1.5
linuxfoundation backstage/plugin-scaffolder-backend 3.1.5

github.com/backstage/backstage@3b62dd2 commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-32237 updated 2026-10-27 cvss 4.4

@backstage/plugin-scaffolder-backend: @backstage/plugin-scaffolder-backend: Possible exposure of defaultEnvironment secrets using dry-run endpoint

Red Hat Self-service automation portal 2 ansible-automation-platform/automation-portal
affected: workaround, no fix available “Fix deferred”
Red Hat Developer Hub 1 rhdh/rhdh-hub-rhel9
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 7 mo ago (2026-03-12)

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.4	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
GitHub	3.1	4.4	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
npm	@backstage/plugin-scaffolder-backend	>=3.1.0, <3.1.5	3.1.5

Affected products

@backstage plugin-scaffolder-backend

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

github.com /backstage/backstage/commit/3b62dd2d6bf7623ebd23e4b5a6dceb209f98dfce
web, patch
github.com /backstage/backstage/security/advisories/GHSA-8wq8-6859-qx77
web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-32237
advisory
github.com /backstage/backstage
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary