CVE-2026-106490

Backstage is an open framework for building developer portals. Prior to 2.2.4, the @backstage/plugin-techdocs-backend package is affected by improper input validation in techdocs static content requests. When using the Azure Blob Storage provider, an authenticated Backstage user may be able to read restricted TechDocs content when entity-level permissions are enabled. Deployments that intentionally disable the default backend authentication policy may have broader exposure. This issue is fixed in version 2.2.4.

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-25)

CWEs

CWE-22, CWE-23

Published

2026-10-06

Modified

2026-10-22

Record from

the NVD, synced 2026-10-22

Affected

• linuxfoundation:backstage
• linuxfoundation:backstage\/plugin-techdocs-backend

Packages (OSV)

References

• https://github.com/backstage/backstage/commit/40ecc4c2e88b0218125b0a3405d1f6315b321974
• https://github.com/backstage/backstage/releases/tag/v1.54.6
• https://github.com/backstage/backstage/security/advisories/GHSA-7mfx-xg57-53c9

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