Vulnerability · Published Mar 7, 2026 · Assigned by GitHub_M
CVE-2026-29184@backstage/plugin-scaffolder-backend: Potential Session Token Exfiltration via Log Redaction Bypass
Low 2.0
In plain English
A low-severity sensitive data in logs in backstage from backstage. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)2.0Low
Exploit odds (30 days)0.3%top 76.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @backstage/plugin-scaffolder-backend | 3.1.4 | GHSA-8qp7-fhr9-fw53 |
Affected products (as reported)
Weakness: CWE-532 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
References
- https://github.com/backstage/backstage/security/advisories/GHSA-8qp7-fhr9-fw53 x_refsource_CONFIRM