CVE-2026-106496
mediumpriority · track · 26OT risk · elevatedEPSS 0.002 · 15 %ileUSEPSS · scored 2026-10-27
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 process location types that were not intended to be allowed, potentially leading to unintended file access on the backend host. This issue is fixed in version 3.9.1.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.1–6.5
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (3)
Products and version ranges known to be affected.
- linuxfoundation backstage plugin-catalog-backend< 3.9.1nvdUScpe:2.3:a:linuxfoundation:backstage_plugin-catalog-backend:*:*:*:*:*:*:*:*
advisories (1)
Vendor and ecosystem advisories describing this.
- GHSA-pcmq-25r3-5w9vBackstage: Inconsistent enforcement of allowed location types during catalog processing2026-10-07ghsa · osvUS
### Impact Under certain configurations, the catalog backend could process location types that were not intended to be allowed, potentially leading to unintended file access on the backend host. ### Patches Patched in `@backstage/plugin-catalog-backend` version `3.9.1` ### Workarounds No practical workarounds are available. Upgrade to the patched version.
sources
Which sources assert this record, and when.
references (3) nvd
External citations — patches, advisories, analysis.
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