GHSA-9ghw-48h5-v2w5Published

Backstage: Improper input validation in proxy-backend

cve-program · CVE-2026-106491

Published

backstage

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "backstage",
                    "product": "backstage",
                    "versions": [
                        {
                            "version": "< 1.54.6",
                            "status": "affected"
                        }
                    ]
                }

plugin-proxy-backend

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "@backstage",
                    "product": "plugin-proxy-backend",
                    "versions": [
                        {
                            "version": "< 0.6.17",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

euvd · EUVD-2026-94010

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Oct 6, 2026, 8:45:08 PM

dateUpdated: Oct 7, 2026, 5:52:11 PM

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

nvd · CVE-2026-106491

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-20 · CWE-22

Original publisher date fields

published: 2026-10-06T21:17:18.073

lastModified: 2026-10-22T14:10:06.117

2 source CPE criteria · context only

cpe:2.3:a:linuxfoundation:backstage\/plugin-proxy-backend:*:*:*:*:*:node.js:*:*
cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GHSA-9ghw-48h5-v2w5

Published

@backstage/plugin-proxy-backend

npm

SEMVER · introduced 0 → fixed 0.6.17

Original source record · Cite this exact observation · Complete original publisher JSON