CVE-2026-32237: @backstage plugin-scaffolder-backend
Vulnerability summary
CVE-2026-32237 is a medium (CVSS 6.5) vulnerability in @backstage plugin-scaffolder-backend. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 35.5% of scored vulnerabilities.
Timeline
- 12-03-2026PublishedVulnerability first disclosed.
- 12-03-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
3 scores · 3 sources · 1 version- CVE.orgCNA4.4MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:NDiffers
- OSV · NpmEcosystem advisory · calculated4.4MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:NDiffers
EPSS trend
Probability
0.43%
Chance of exploitation in the next 30 days
Percentile
36%
Versus all other CVEs
30-day change
+0.19 pp
From 0.24% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
@backstage2 products
- plugin-scaffolder-backend< 3.1.5
- plugin-scaffolder-backend≥ 3.1.0, < 3.1.5
Linuxfoundation1 product
- backstage\/plugin-scaffolder-backend≥ 3.1.0, < 3.1.5
2 vendors · 3 products
References
4 links- github.com/backstage/backstage/security/advisories/GHSA-8wq8-6859-qx77X Refsource CONFIRMWEBVendor Advisory
- github.com/backstage/backstage/commit/3b62dd2d6bf7623ebd23e4b5a6dceb209f98dfceX Refsource MISCWEBPatch
