Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-106498

Backstage is an open framework for building developer portals. Prior to 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1, the @backstage/plugin-catalog-backend package is affected by improper url validation in catalog entity placeholder resolution. An authenticated Backstage user could craft a catalog entity with placeholder directives that reference resources outside the entity's source repository. Under certain configurations, this could allow access to data not intended to be available to the user. This issue is fixed in versions 3.5.1, 3.6.2, 3.7.2, 3.8.2 and 3.9.1.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 21.9%
CVSS Severity
CVSS v3 Score 7.7
References
Products affected by CVE-2026-106498


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