CVE-2026-29184 PUBLISHED

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

Assigner: GitHub_M
Reserved: 04.03.2026 Published: 07.03.2026 Updated: 07.03.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
CVSS Score: 2

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	Low
Privileges Required	High	Integrity Impact	None
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	backstage
Product	backstage
Versions	Version < 3.1.4 is affected

References

https://github.com/backstage/backstage/security/advisories/GHSA-8qp7-fhr9-fw53

Problem Types

CWE-532: Insertion of Sensitive Information into Log File CWE