{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.50.5"
              },
              {
                "introduced": "1.51.0-next.0"
              },
              {
                "fixed": "1.54.6"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "introduced": "e2fdc2b61fe9046574a8fc1d99b18053018db0a8"
            },
            {
              "fixed": "f3e982bd0530f51760c8a70d21eafaa7aed2e6eb"
            },
            {
              "fixed": "0e67bc1fc88fba3a8cb716d3584cef05ecbcf9a8"
            },
            {
              "fixed": "a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9"
            },
            {
              "fixed": "ef92d3d2b76046205c580e7152956514c15640db"
            }
          ],
          "repo": "https://github.com/backstage/backstage",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-p75x-jh7p-ppcx"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-426",
      "CWE-436"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106505.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "1.14.6"
          },
          {
            "introduced": "1.15.0"
          },
          {
            "fixed": "1.15.4"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation. This issue is fixed in versions 1.14.6 and 1.15.4.",
  "id": "CVE-2026-106505",
  "modified": "2026-10-08T02:30:35.903455379Z",
  "published": "2026-10-06T21:43:08.370Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/backstage/backstage/releases/tag/v1.50.5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/backstage/backstage/releases/tag/v1.54.6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106505.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-106505"
    },
    {
      "type": "FIX",
      "url": "https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9"
    },
    {
      "type": "FIX",
      "url": "https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend"
}