{"id":"CVE-2026-27900","aliases":["GHSA-5rc7-2jj6-mp64","GO-2026-4562"],"url":"https://o3.security/vulnerability/CVE-2026-27900","summary":"Terraform Provider 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","published":"2026-02-26T00:53:19.168Z","modified":"2026-08-12T03:51:35.574309161Z","cvss":{"score":5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/linode/terraform-provider-linode/v3","fixedVersion":"3.9.0"},{"ecosystem":"Go","name":"github.com/linode/terraform-provider-linode/v2","fixedVersion":null},{"ecosystem":"Go","name":"github.com/linode/terraform-provider-linode","fixedVersion":null}],"fix":{"url":"https://github.com/linode/terraform-provider-linode/commit/43a925d826b999f0355de3dc7330c55f496824c0","label":"linode/terraform-provider-linode@43a925d"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/02/26/2"},{"type":"WEB","url":"https://github.com/linode/terraform-provider-linode/releases/tag/v3.9.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27900.json"},{"type":"ADVISORY","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":"FIX","url":"https://github.com/linode/terraform-provider-linode/commit/43a925d826b999f0355de3dc7330c55f496824c0"},{"type":"FIX","url":"https://github.com/linode/terraform-provider-linode/pull/2269"},{"type":"PACKAGE","url":"https://github.com/linode/terraform-provider-linode"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:35.574309161Z"}}