{"id":"CVE-2026-106455","revision":null,"records":[{"revision":"a16674f48bc54f53a227840d61f92837","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-106455","aliases":[],"title":"Backstage: Improper validation of MkDocs plugin configuration in TechDocs","description":"Backstage is an open framework for building developer portals. From 0.11.12 until 1.14.7 and 1.15.5, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs plugin configuration in techdocs. An authenticated attacker with control over a TechDocs source repository could cause a documentation build to retrieve and publish data from network locations reachable by the build environment. Exposure depends on deployment topology, build mode, and target endpoint protections. Modern cloud metadata services that require tokens or special headers are not directly accessible through the affected behavior. This issue is fixed in @backstage/plugin-techdocs-node versions 1.14.7 and 1.15.5.","state":0,"publishedAt":"2026-10-06T20:06:06.505+00:00","modifiedAt":"2026-10-09T01:46:59.251+00:00","affected":[{"ecosystem":"Vendor product","name":"backstage","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"backstage\",\n                    \"product\": \"backstage\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 0.71.1, < 1.50.6\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 1.51.0-next.0, < 1.54.8\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"plugin-techdocs-node","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"@backstage\",\n                    \"product\": \"plugin-techdocs-node\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 0.11.12, < 1.14.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 1.15.0, < 1.15.5\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","score":7.7,"severity":"HIGH"}],"references":["https://github.com/backstage/backstage/security/advisories/GHSA-q38j-6vcm-2f5m","https://github.com/backstage/backstage/commit/28aa82ae2815988721dd7bbf43cd69c431dcd71b","https://github.com/backstage/backstage/commit/9f76ea445088961f68c364764cc4b7734f368fc0","https://github.com/backstage/backstage/releases/tag/v1.50.6","https://github.com/backstage/backstage/releases/tag/v1.54.8","https://github.com/backstage/backstage/releases/tag/v1.55.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-106455","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-106455","identifiers":["CVE-2026-106455"]},"retained":false,"historicalAffected":[]},{"revision":"a7bb7656fc3f4345903b709d8783a1b0","observedAt":"2026-11-09T05:06:41.902+00:00","statement":{"source":"euvd","id":"EUVD-2026-93986","aliases":["CVE-2026-106455","GHSA-q38j-6vcm-2f5m"],"title":"Backstage is an open framework for building developer portals. 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This issue is fixed in @backstage/plugin-techdocs-node versions 1.14.7 and 1.15.5.","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:H/I:N/A:N","score":7.7,"severity":null}],"references":["https://github.com/backstage/backstage/security/advisories/GHSA-q38j-6vcm-2f5m","https://github.com/backstage/backstage/commit/28aa82ae2815988721dd7bbf43cd69c431dcd71b","https://github.com/backstage/backstage/commit/9f76ea445088961f68c364764cc4b7734f368fc0","https://github.com/backstage/backstage/releases/tag/v1.50.6","https://github.com/backstage/backstage/releases/tag/v1.54.8","https://github.com/backstage/backstage/releases/tag/v1.55.0"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-93986","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 6, 2026, 8:06:06 PM","dateUpdated":"Oct 9, 2026, 1:46:59 AM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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From 0.11.12 until 1.14.7 and 1.15.5, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs plugin configuration in techdocs. An authenticated attacker with control over a TechDocs source repository could cause a documentation build to retrieve and publish data from network locations reachable by the build environment. Exposure depends on deployment topology, build mode, and target endpoint protections. Modern cloud metadata services that require tokens or special headers are not directly accessible through the affected behavior. This issue is fixed in @backstage/plugin-techdocs-node versions 1.14.7 and 1.15.5.","state":0,"publishedAt":"2026-10-06T21:17:15.727+00:00","modifiedAt":"2026-10-13T15:27:12.653+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","score":7.7,"severity":"HIGH"}],"references":["https://github.com/backstage/backstage/commit/28aa82ae2815988721dd7bbf43cd69c431dcd71b","https://github.com/backstage/backstage/commit/9f76ea445088961f68c364764cc4b7734f368fc0","https://github.com/backstage/backstage/releases/tag/v1.50.6","https://github.com/backstage/backstage/releases/tag/v1.54.8","https://github.com/backstage/backstage/releases/tag/v1.55.0","https://github.com/backstage/backstage/security/advisories/GHSA-q38j-6vcm-2f5m"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-106455","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-918"],"productCriteria":["cpe:2.3:a:linuxfoundation:backstage_plugin-techdocs-node:*:*:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:-:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:next0:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:next1:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:next2:*:*:*:*:*:*","cpe:2.3:a:linuxfoundation:backstage:1.51.0:next3:*:*:*:*:*:*"],"sourceDates":{"published":"2026-10-06T21:17:15.727","lastModified":"2026-10-13T15:27:12.653"},"relatedAdvisories":[],"note":"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."},"key":"nvd:CVE-2026-106455","identifiers":["CVE-2026-106455"]},"retained":false,"historicalAffected":[]},{"revision":"7dc90ac9831b4c83a25331c0e66da9cc","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-q38j-6vcm-2f5m","aliases":["CVE-2026-106455"],"title":"Backstage: Improper validation of MkDocs plugin configuration in TechDocs","description":"### Impact\n\nAn authenticated attacker with control over a TechDocs source repository could cause a documentation build to retrieve and publish data from network locations reachable by the build environment. Exposure depends on deployment topology, build mode, and target endpoint protections. Modern cloud metadata services that require tokens or special headers are not directly accessible through the affected behavior.\n\n### Patches\n\nUpgrade `@backstage/plugin-techdocs-node` to a patched version for the applicable release line:\n\n- `1.14.x`: upgrade to `1.14.7` or later in that line, available in [Backstage v1.50.6](https://github.com/backstage/backstage/releases/tag/v1.50.6).\n- `1.15.x`: upgrade to `1.15.5` or later, available in [Backstage v1.54.8](https://github.com/backstage/backstage/releases/tag/v1.54.8).\n- Current mainline: upgrade to `2.0.0` or later, available in [Backstage v1.55.0](https://github.com/backstage/backstage/releases/tag/v1.55.0).\n\nThe update removes MkDocs plugins outside the built-in allowlist. To retain additional plugins, review them and configure `techdocs.generator.mkdocs.dangerouslyAllowAdditionalPlugins`, or supply `dangerouslyAllowAdditionalPlugins` when creating the generator directly. Plugins supplied through `defaultPlugins` remain permitted.\n\n### Workarounds\n\n- Restrict control of TechDocs source repositories and catalog registration to trusted maintainers.\n- Run documentation builders with outbound access to private and link-local networks denied.\n- Require token- or header-protected cloud instance metadata services.","state":0,"publishedAt":"2026-10-07T20:25:19+00:00","modifiedAt":"2026-10-07T20:30:07.0850701+00:00","affected":[{"ecosystem":"npm","name":"@backstage/plugin-techdocs-node","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.11.12"},{"kind":"fixed","version":"1.14.7"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"@backstage/plugin-techdocs-node","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"1.15.0"},{"kind":"fixed","version":"1.15.5"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/backstage/backstage/security/advisories/GHSA-q38j-6vcm-2f5m","https://nvd.nist.gov/vuln/detail/CVE-2026-106455","https://github.com/backstage/backstage/commit/28aa82ae2815988721dd7bbf43cd69c431dcd71b","https://github.com/backstage/backstage/commit/9f76ea445088961f68c364764cc4b7734f368fc0","https://github.com/backstage/backstage","https://github.com/backstage/backstage/releases/tag/v1.50.6","https://github.com/backstage/backstage/releases/tag/v1.54.8","https://github.com/backstage/backstage/releases/tag/v1.55.0"],"sourceUrl":"https://github.com/advisories/GHSA-q38j-6vcm-2f5m","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-q38j-6vcm-2f5m","identifiers":["GHSA-q38j-6vcm-2f5m","CVE-2026-106455"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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