{"schema":"threatline.record/2","record":{"id":"CVE-2026-106498","aliases":["GHSA-qgvj-qcf8-xq73"],"summary":"Backstage: Improper URL validation in catalog entity placeholder resolution","details":"### Impact\n\nAn authenticated Backstage user could craft a catalog entity with placeholder directives that reference resources outside the entity's source repository. Under certain configurations, this could allow access to data not intended to be available to the user.\n\n### Patches\n\nPatched in `@backstage/plugin-catalog-backend` version `3.9.1`\n\n### Workarounds\n\nIf you're not able to update immediately:\n\n- Limit the scope of integration credentials (e.g., GitHub tokens) to only the repositories that Backstage needs to access.","categories":["Libraries & packages"],"product":"@backstage/plugin-catalog-backend","vendor":"backstage","ecosystem":"npm","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-qgvj-qcf8-xq73","source_modified_at":"2026-10-07T17:59:29Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@backstage/plugin-catalog-backend"},"range":"< 3.9.1"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-106498","source_modified_at":"2026-10-09T01:55:00.494Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"backstage","vendor":"backstage","versions":[{"version":"< 1.49.6","status":"affected"},{"version":">= 1.50.0-next.0, < 1.50.5","status":"affected"},{"version":">= 1.51.0-next.0, < 1.51.3","status":"affected"},{"version":">= 1.52.0-next.0, < 1.53.2","status":"affected"},{"version":">= 1.54.0-next.0, < 1.54.6","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-106498","source_modified_at":"2026-10-09T01:55:00.494Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"plugin-catalog-backend","vendor":"@backstage","versions":[{"version":"< 3.5.1","status":"affected"},{"version":">= 3.6.0, < 3.6.2","status":"affected"},{"version":">= 3.7.0, < 3.7.2","status":"affected"},{"version":">= 3.8.0, < 3.8.2","status":"affected"},{"version":">= 3.9.0, < 3.9.1","status":"affected"}],"defaultStatus":null},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-qgvj-qcf8-xq73","source_modified_at":"2026-10-07T18:15:10.710570023Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@backstage/plugin-catalog-backend","purl":"pkg:npm/%40backstage/plugin-catalog-backend"},"ranges":[{"events":[{"introduced":"0"},{"fixed":"3.9.1"}],"type":"SEMVER"}],"versions":[]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-qgvj-qcf8-xq73","source_modified_at":"2026-10-07T17:59:29Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@backstage/plugin-catalog-backend"},"version":"3.9.1"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-qgvj-qcf8-xq73","source_modified_at":"2026-10-07T18:15:10.710570023Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@backstage/plugin-catalog-backend","purl":"pkg:npm/%40backstage/plugin-catalog-backend"},"version":"3.9.1"}],"cvss":7.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00307,"percentile":0.22283,"score_date":"2026-10-23"},"published_at":"2026-10-06T21:23:37.560Z","modified_at":"2026-10-09T01:55:00.494Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-qgvj-qcf8-xq73","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-07T17:59:29Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-106498","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-09T01:55:00.494Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-qgvj-qcf8-xq73","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-07T18:15:10.710570023Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-106498","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/backstage/backstage/security/advisories/GHSA-qgvj-qcf8-xq73","tags":["x_refsource_CONFIRM"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106498","source":"GitHub Advisory Database"},{"source":"CVE List","url":"https://github.com/backstage/backstage/commit/0b0f6fc89b4eb4872c76a498abbe1dc65998bb6e","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/commit/286bfc1f9cc3608a073b41016be302785be385d1","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/commit/61a10f19926aeda7f4a32de48d733e6710584634","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/commit/99729e925fd2bd40ba210022351a0ee6318e6197","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/commit/e786ac309ed2d775daf2309393c015c43902d6f6","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/releases/tag/v1.49.6","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/releases/tag/v1.50.5","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/releases/tag/v1.51.3","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/releases/tag/v1.53.2","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","tags":["x_refsource_MISC"]},{"url":"https://github.com/advisories/GHSA-qgvj-qcf8-xq73","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-09T01:54:51.540668Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-09T01:55:00.494Z","content_hash":"cb5c6cfaac9a95463f261641282f6c1073e4bc31acb94f5199519e9e31c135fd"}}