Is CVE-2026-106490 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-106490 being exploited in the wild.

How severe is CVE-2026-106490?

Medium severity, with a CVSS score of 6.5, published 6 October 2026.

Which products and versions are affected?

Backstage Plugin-Techdocs-Backend prior to 2.2.4; @backstage/plugin-techdocs-backend (npm) < 2.2.4, SEMVER:introduced=0,fixed=2.2.4.

Is there a fix for CVE-2026-106490?

Yes. @backstage/plugin-techdocs-backend (npm): upgrade to 2.2.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-106490 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-106490?

Check whether you run Backstage Plugin-Techdocs-Backend or @backstage/plugin-techdocs-backend (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-106490: Backstage plugin-techdocs-backend path validation in Azure Blob Storage

Q: Is there a fix for CVE-2026-106490?

Yes. @backstage/plugin-techdocs-backend (npm): upgrade to 2.2.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-106490 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-106490?

Check whether you run Backstage Plugin-Techdocs-Backend or @backstage/plugin-techdocs-backend (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-106490 · Severity: medium · CVSS 6.5 · Published 2026-10-06

Backstage is an open framework for building internal developer portals that centralize documentation and tools. An authentication bypass flaw in the TechDocs backend plugin could allow authenticated users to read restricted documentation content when using Azure Blob Storage, potentially exposing sensitive technical information that should be protected by entity-level permissions.

Technologies: Backstage Plugin-Techdocs-Backend, @backstage/plugin-techdocs-backend (npm). Vendors: Backstage, npm.

Quick answers

Is CVE-2026-106490 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-106490 being exploited in the wild.
How severe is CVE-2026-106490?: Medium severity, with a CVSS score of 6.5, published 6 October 2026.
Which products and versions are affected?: Backstage Plugin-Techdocs-Backend prior to 2.2.4; @backstage/plugin-techdocs-backend (npm) < 2.2.4, SEMVER:introduced=0,fixed=2.2.4.
Is there a fix for CVE-2026-106490?: Yes. @backstage/plugin-techdocs-backend (npm): upgrade to 2.2.4 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-106490 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-106490?: Check whether you run Backstage Plugin-Techdocs-Backend or @backstage/plugin-techdocs-backend (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

@backstage/plugin-techdocs-backend (npm): upgrade to 2.2.4 or later
```
npm install @backstage/plugin-techdocs-backend@2.2.4
```

Technical details

The @backstage/plugin-techdocs-backend package contains improper input validation in static content requests, specifically affecting path handling when Azure Blob Storage is used as the storage provider. An authenticated Backstage user can bypass entity-level permission checks to access restricted TechDocs content through path manipulation. Deployments that disable the default backend authentication policy face broader exposure.

Affected products

Backstage plugin-techdocs-backend prior to 2.2.4

Identifiers

CVE-2026-106490
GHSA-7mfx-xg57-53c9

Timeline

2026-10-06: disclosed

References

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