Medium
Backstage: Improper input validation in TechDocs static content requests
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-106490
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 08:35 UTC · Revision 1
Source evidence
Backstage: Improper input validation in TechDocs static content requests
core-osv · Original sourcePublished 6 Oct 2026, 20:41 UTC
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.
osv:CVE-2026-106490
Complete source record
{
"id": "b01acd6bc939e19dfa17ffd0f1099f516d415e0abe1719cb9d77b8e2f5853b15",
"url": "https://osv.dev/vulnerability/CVE-2026-106490",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Backstage: Improper input validation in TechDocs static content requests",
"summary": "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.",
"evidence": "osv:CVE-2026-106490",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-106490",
"aliases": [
"CVE-2026-106490",
"GHSA-7mfx-xg57-53c9"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
}
],
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{
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"modified": "2026-10-28T02:30:34.004902669Z",
"provider": "osv",
"references": [
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"https://nvd.nist.gov/vuln/detail/CVE-2026-106490",
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}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 501182,
"published_at": "2026-10-06T20:41:26.668+00:00"
}