{"id":"EUVD-2026-94010","revision":"bab247ecd50f498fb9dd2e6d8ac03216","records":[{"revision":"bab247ecd50f498fb9dd2e6d8ac03216","observedAt":"2026-10-28T00:49:36.288+00:00","statement":{"source":"euvd","id":"EUVD-2026-94010","aliases":["CVE-2026-106491","GHSA-9ghw-48h5-v2w5"],"title":"Backstage is an open framework for building developer portals. Prior to 0.6.17, the @backstage/plugin-proxy-backend package is affected by improper input validation in proxy-backend. An authenticated Backstage user could craft a request URL…","description":"Backstage is an open framework for building developer portals. Prior to 0.6.17, the @backstage/plugin-proxy-backend package is affected by improper input validation in proxy-backend. An authenticated Backstage user could craft a request URL that causes the proxy-backend to forward the request to a path outside the configured base path on the target server. This is limited to target servers already configured as proxy endpoints and requires Backstage authentication by default. This issue is fixed in version 0.6.17.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","score":6.4,"severity":null}],"references":["https://github.com/backstage/backstage/security/advisories/GHSA-9ghw-48h5-v2w5","https://github.com/backstage/backstage/commit/233287d0ce3133e41549bf92a7470c940a41753c","https://github.com/backstage/backstage/releases/tag/v1.54.6"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-94010","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 6, 2026, 8:45:08 PM","dateUpdated":"Oct 7, 2026, 5:52:11 PM"},"relatedAdvisories":[],"note":"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."},"key":"euvd:EUVD-2026-94010","identifiers":["EUVD-2026-94010","CVE-2026-106491","GHSA-9ghw-48h5-v2w5"]},"retained":false,"historicalAffected":[]}],"coverage":[]}