CVE-2026-106455 (GCVE-0-2026-106455)

Vulnerability from cvelistv5 – Published: 2026-10-06 20:06 – Updated: 2026-10-06 20:06
VLAI
Title
Backstage: Improper validation of MkDocs plugin configuration in TechDocs
Summary
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.
Severity
7.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
Impacted products
Vendor Product Version CPE status
backstage backstage Affected: >= 0.71.1, < 1.50.6
Affected: >= 1.51.0-next.0, < 1.54.8
guessed Create a notification for this product.
@backstage plugin-techdocs-node Affected: >= 0.11.12, < 1.14.7
Affected: >= 1.15.0, < 1.15.5
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
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          "vendor": "backstage",
          "versions": [
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            },
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              "status": "affected",
              "version": "\u003e= 1.51.0-next.0, \u003c 1.54.8"
            }
          ]
        },
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          "product": "plugin-techdocs-node",
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              "version": "\u003e= 0.11.12, \u003c 1.14.7"
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        }
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          "url": "https://github.com/backstage/backstage/security/advisories/GHSA-q38j-6vcm-2f5m"
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          "name": "https://github.com/backstage/backstage/commit/28aa82ae2815988721dd7bbf43cd69c431dcd71b",
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          "tags": [
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      "source": {
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        "discovery": "UNKNOWN"
      },
      "title": "Backstage: Improper validation of MkDocs plugin configuration in TechDocs"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-106455",
    "datePublished": "2026-10-06T20:06:06.505Z",
    "dateReserved": "2026-10-06T16:49:40.591Z",
    "dateUpdated": "2026-10-06T20:06:06.505Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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      "date": "2026-10-07",
      "epss": "0.00332",
      "percentile": "0.24401"
    },
    "nvd": {
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                "versions": [
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                    "version": "\u003e= 0.71.1, \u003c 1.50.6"
                  },
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                    "status": "affected",
                    "version": "\u003e= 1.51.0-next.0, \u003c 1.54.8"
                  }
                ]
              },
              {
                "product": "plugin-techdocs-node",
                "vendor": "@backstage",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e= 0.11.12, \u003c 1.14.7"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 1.15.0, \u003c 1.15.5"
                  }
                ]
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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."
          }
        ],
        "id": "CVE-2026-106455",
        "lastModified": "2026-10-07T13:58:29.527",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
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                "userInteraction": "NONE",
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            "url": "https://github.com/backstage/backstage/releases/tag/v1.54.8"
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            "url": "https://github.com/backstage/backstage/releases/tag/v1.55.0"
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          }
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        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Awaiting Analysis",
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              }
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      "current_release_date": "2026-10-07T12:36:06+00:00",
      "cve": "CVE-2026-106455",
      "id": "CVE-2026-106455",
      "initial_release_date": "2026-10-06T20:06:06.505000+00:00",
      "product_status:known_affected": "3",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "@backstage/plugin-techdocs-node: @backstage/plugin-techdocs-node: Information disclosure via improper MkDocs configuration validation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106455.json",
      "version": "3"
    }
  }
}



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Nomenclature

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