CVE-2026-27900: Github.com/linode/terraform provider linode/v3 Terraform Provider For Linode Debug Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5rc7-2jj6-mp64",
  "modified" : "2026-02-26T20:00:12Z",
  "published" : "2026-02-26T20:00:12Z",
  "aliases" : [ "CVE-2026-27900" ],
  "summary" : "Terraform Provider  for Linode Debug Logs Vulnerable to Sensitive Information Exposure",
  "details" : "### Impact\nThe Terraform Provider for Linode versions prior to v3.9.0 logged sensitive information including some passwords, StackScript content, object storage data, and NodeBalancer TLS keys in debug logs without redaction.\n\n**Important:** Provider debug logging is **not enabled by default**.  \nThis issue is exposed when debug/provider logs are explicitly enabled (for example in local troubleshooting, CI/CD jobs, or centralized log collection). If enabled, sensitive values may be written to logs and then retained, shared, or exported beyond the original execution environment.\n\nSpecifically:\n- Instance creation operations logged the full InstanceCreateOptions struct containing RootPass and StackScriptData\n- Instance disk creation logged InstanceDiskCreateOptions containing RootPass and StackscriptData\n- StackScript update operations logged the complete script content via StackscriptUpdateOptions.Script\n- Image share group member creation logged tokens in ImageShareGroupAddMemberOptions.Token\n- Object storage operations logged full PutObjectInput structures containing user data\n- NodeBalancer config create and update operations logged NodeBalancerConfigCreateOptions and NodeBalancerConfigUpdateOptions containing the SSLKey (TLS private key)\n\nAn authenticated user with access to provider debug logs (through log aggregation systems, CI/CD pipelines, or debug output) would thus be able to extract these sensitive credentials.\n\n### Patches\nUpdate to version v3.9.0 or later, which sanitizes debug logs by logging only non-sensitive metadata such as labels, regions, and resource IDs while redacting credentials, tokens, keys, scripts, and other sensitive content.\n\n### Workarounds and Mitigations\n- Disable Terraform/provider debug logging or set it to `WARN` level or above\n  - To disable the logging, you can unset `TF_LOG_PROVIDER` and `TF_LOG` environment variables\n  - Or you can set them to `WARN` or `ERROR` levels to avoid sensitive information logged in `INFO` and `DEBUG` levels.\n  - See Terraform docs for details: https://developer.hashicorp.com/terraform/internals/debugging\n- Restrict access to existing and historical logs\n- Purge/retention-trim logs that may contain sensitive values\n- Rotate potentially exposed secrets/credentials, including:\n  - Root passwords\n  - Image share group tokens\n  - TLS private keys/certificates used in NodeBalancer configs\n  - StackScript content/secrets if embedded\n\n### Credits\nThis issue was reported to Terraform by Hasan Sheet via [Akamai's HackerOne Bug Bounty program](https://hackerone.com/akamai).\n\n### Resources\nhttps://github.com/linode/terraform-provider-linode/releases/tag/v3.9.0\nhttps://github.com/linode/terraform-provider-linode/pull/2269\nhttps://github.com/linode/terraform-provider-linode/commit/43a925d826b999f0355de3dc7330c55f496824c0",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/linode/terraform-provider-linode/v3"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.9.0"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/linode/terraform-provider-linode/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.41.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/linode/terraform-provider-linode"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.30.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/linode/terraform-provider-linode/security/advisories/GHSA-5rc7-2jj6-mp64"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-27900"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/linode/terraform-provider-linode/pull/2269"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/linode/terraform-provider-linode/commit/43a925d826b999f0355de3dc7330c55f496824c0"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/linode/terraform-provider-linode"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/linode/terraform-provider-linode/releases/tag/v3.9.0"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/02/26/2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-532" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-26T20:00:12Z",
    "nvd_published_at" : "2026-02-26T02:16:20Z"
  }
}