Backstage is an open framework for building developer portals. Prior to 3.9.2 and from 4.0.0 until 4.0.2, DefaultCatalogRulesEnforcer in @backstage/plugin-catalog-backend compares the raw location.target URL against catalog.rules, while URL readers canonicalize the same URL befor...
Product
backstage plugin-catalog-backend vulnerabilities
6 published CVES affecting backstage plugin-catalog-backend, from public sources (CVE.org, NVD, CISA KEV, FIRST EPSS, OSV).
- Total
- 6
- Critical
- 0
- High
- 1
- Medium
- 5
- Low
- 0
- Unscored
- 0
- CISA KEV
- 0
Latest backstage plugin-catalog-backend CVEs
Newest publication first
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MediumCVSS 6.5 EPSS 0.32%
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CVE-2026-106498 Backstage: Improper URL validation in catalog entity placeholder resolution
PublishedHighCVSS 7.7 EPSS 0.31%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...
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MediumCVSS 4.3 EPSS 0.19%
Backstage is an open framework for building developer portals. Prior to 3.9.1, the @backstage/plugin-catalog-backend package is affected by inconsistent catalog property permission evaluation. In deployments that use affected value-based catalog permission conditions as a confide...
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MediumCVSS 6.5 EPSS 0.24%
Backstage is an open framework for building developer portals. Prior to 3.9.1, the @backstage/plugin-catalog-backend package is affected by inconsistent enforcement of allowed location types during catalog processing. Under certain configurations, the catalog backend could proces...
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MediumCVSS 6.5 EPSS 0.51%
Backstage is an open framework for building developer portals. A malicious actor with authenticated access to a Backstage instance with the catalog backend plugin installed is able to interrupt the service using a specially crafted query to the catalog API. This has been fixed in...
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MediumCVSS 5.4 EPSS 0.45%
Backstage is an open platform for building developer portals. @backstage/catalog-model prior to version 1.2.0, @backstage/core-components prior to 0.12.4, and @backstage/plugin-catalog-backend prior to 1.7.2 are affected by a cross-site scripting vulnerability. This vulnerability...
Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.