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TI-2026-23301 Aliases CVE-2026-29184GHSA-8qp7-fhr9-fw53

@backstage/plugin-scaffolder-backend: Potential Session Token Exfiltration via Log Redaction Bypass

Priority LOW 29CWE-532Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-532.

Summary

Backstage is an open framework for building developer portals. Prior to version 3.1.4, a malicious scaffolder template can bypass the log redaction mechanism to exfiltrate secrets provided run through task event logs. This issue has been patched in version 3.1.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00305 23rd percentileScored 2026-11-07
Fix Partial backstage (backstage): 3.1.4@backstage/plugin-scaffolder-backend (npm): 3.1.4Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
backstagebackstagebefore 3.1.43.1.4Patch availableCNA
—@backstage/plugin-scaffolder-backend (npm)before 3.1.43.1.4Patch availableGHSA-8qp7-fhr9-fw53
  • backstage Vendorbackstage Affected before 3.1.4 Fixed in 3.1.4 Patch available CNA
  • @backstage/plugin-scaffolder-backend (npm) Vendor— Affected before 3.1.4 Fixed in 3.1.4 Patch available GHSA-8qp7-fhr9-fw53

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend:*:*:*:*:*:*:*:*before 3.1.4Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend:*:*:*:*:*:*:*:* Versions before 3.1.4 Vulnerable ·backstage

Remediation

  • Fix · CNA backstage (backstage) Fixed in 3.1.4
  • Fix · GHSA-8qp7-fhr9-fw53 @backstage/plugin-scaffolder-backend (npm) Fixed in 3.1.4 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Developer Hub 1AffectedNo fix yet: Fix deferred
Self-service automation portal 2AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-29184
  2. 2026-10-03 Alias added: GHSA-8qp7-fhr9-fw53
  3. 2026-10-27 Affected versions changed · Red Hat

References

Advisory 2

Other 3

  • TI-2026-69075 Sensitive information exposure in Backstage Scaffolder CVSS 3.1CRITICAL 9.6
  • TI-2026-69074 Race condition in Backstage scaffolder backend task handling CVSS 3.1HIGH 8.5
  • TI-2026-69077 Authorization bypass in Backstage Scaffolder action inputs CVSS 3.1HIGH 8.1
  • TI-2026-24766 @backstage/plugin-scaffolder-backend: Possible exposure of defaultEnvironment secrets using dry-run endpoint CVSS 3.1MEDIUM 6.5
  • TI-2026-69078 Sensitive information exposure in Backstage scaffolder task logs CVSS 3.1MEDIUM 6.5
  • TI-2026-69058 Backstage scaffolder may fall back to broader integration credentials CVSS 3.1MEDIUM 6.4
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences