{"items":[{"id":"NVI-00016365","kind":"vulnerability","title":"OpenTofu has high CPU usage when using K8S remote state backend or when parsing specifically crafted TLS certificates from untrusted or compromised servers","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-22w5-2fxg-vrwx"],"plain_summary":"GitHub lists this reviewed advisory for github.com/opentofu/opentofu, github.com/opentofu/opentofu. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-6b1e62b8b7cd1ab19e4a070a6873cacc"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-08-20T18:36:23.000Z","value":"2.6 low","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-6b1e62b8b7cd1ab19e4a070a6873cacc"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-6b1e62b8b7cd1ab19e4a070a6873cacc","url":"https://github.com/advisories/GHSA-22w5-2fxg-vrwx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-22w5-2fxg-vrwx","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T20:14:33.912Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6b1e62b8b7cd1ab19e4a070a6873cacc"],"technology":"github.com/opentofu/opentofu","known_exclusions":[],"conditions_summary":"### Impact\n\nUnauthenticated denial of service.\n\n### Summary\n\nWhen OpenTofu performs requests against an untrusted (or compromised) third-party server or connects to an attacker-controlled server, the initial connection negotiation can produce high CPU usage, leading to possible denial of service.\n\nThese vulnerabilities **do not** permit arbitrary code execution or allow disclosure of confidential information.\n\n### Details\n\nOpenTofu relies on third-party implementations of TLS certificate verification and HTTP request execution from the standard library of the Go programming language.\n\nThe Go project has recently published the following advisories for those implementations which indirectly affect OpenTofu's behavior:\n\n- CVE-2026-42504: Quadratic complexity in WordDecoder.DecodeHeader in mime\n- CVE-2026-27145: Inefficient candidate hostname parsing in crypto/x509\n\nCVE-2026-42504 affects OpenTofu's K8S remote state implementation. The operator of a configuration that uses such a backend needs to double-check the trustworthiness of the server used for this purpose. \nIn situations where","public_affected_ranges":[">= 1.12.0-beta1, < 1.12.2"]},{"certainty":"source_listed","source_ids":["sr-6b1e62b8b7cd1ab19e4a070a6873cacc"],"technology":"github.com/opentofu/opentofu","known_exclusions":[],"conditions_summary":"### Impact\n\nUnauthenticated denial of service.\n\n### Summary\n\nWhen OpenTofu performs requests against an untrusted (or compromised) third-party server or connects to an attacker-controlled server, the initial connection negotiation can produce high CPU usage, leading to possible denial of service.\n\nThese vulnerabilities **do not** permit arbitrary code execution or allow disclosure of confidential information.\n\n### Details\n\nOpenTofu relies on third-party implementations of TLS certificate verification and HTTP request execution from the standard library of the Go programming language.\n\nThe Go project has recently published the following advisories for those implementations which indirectly affect OpenTofu's behavior:\n\n- CVE-2026-42504: Quadratic complexity in WordDecoder.DecodeHeader in mime\n- CVE-2026-27145: Inefficient candidate hostname parsing in crypto/x509\n\nCVE-2026-42504 affects OpenTofu's K8S remote state implementation. The operator of a configuration that uses such a backend needs to double-check the trustworthiness of the server used for this purpose. \nIn situations where","public_affected_ranges":["< 1.11.9"]}],"null_published_at":"2026-11-04T10:04:27.936Z","source_updated_at":"2026-08-20T18:36:23.000Z","source_disclosed_at":"2026-08-20T18:36:22.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-02T20:14:33.912Z"}],"next_cursor":null,"snapshot_revision":"42594"}