{"items":[{"id":"NVI-00012909","kind":"vulnerability","title":"fastify vulnerable to header validation bypass via incomplete schema case normalization","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-9q9j-q6p8-xq58","CVE-2026-84428"],"plain_summary":"GitHub lists this reviewed advisory for fastify. 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-1545e79d3d34c5ec540d545d4ea2ca8b"],"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":"2026-09-30T23:44:29.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-045cd6d3a64702c527f68e089f8ca929"},{"kind":"CVSS","as_of":"2026-09-15T19:54:32.420Z","value":"7.5 HIGH (3.1)","meaning":"ce714d77-add3-4f53-aff5-83d477b104bb severity; no combined Null risk score.","source_id":"sr-24f2858bcdcc0449d6626838e19a7682"},{"kind":"EPSS","as_of":"2026-11-03T12:00:27.000Z","value":"0.524%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.44522. Missing scores are unknown.","source_id":"sr-1545e79d3d34c5ec540d545d4ea2ca8b"}],"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-045cd6d3a64702c527f68e089f8ca929","url":"https://github.com/advisories/GHSA-9q9j-q6p8-xq58","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9q9j-q6p8-xq58","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:22:52.960Z"},{"id":"sr-24f2858bcdcc0449d6626838e19a7682","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84428","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-84428","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-04T09:59:21.684Z"},{"id":"sr-1545e79d3d34c5ec540d545d4ea2ca8b","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-84428","publisher":"FIRST EPSS","observed_at":"2026-11-03T17:45:16.083Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-045cd6d3a64702c527f68e089f8ca929"],"technology":"fastify","known_exclusions":[],"conditions_summary":"### Impact\n\nFastify lowercases header-schema property names before compiling the schema, because Node.js stores request header names in lowercase. That normalization was incomplete: it lowercased only top-level `properties` keys and the root `required` array, and did not lowercase the JSON Schema Draft 7 `dependencies` keyword (its trigger keys and dependent property names) or names in nested subschemas. As a result, a header schema that uses `dependencies` to require one header when another is present (for example `X-Admin` requiring `X-Admin-Token`) never matches the lowercased request headers, so the dependency assertion is silently skipped. An unauthenticated remote client can send the header that activates a privileged path while omitting the header the dependency was meant to require, bypassing a schema-enforced security control. The header schema is idiomatic, valid JSON Schema Draft 7, and no custom validator, malformed request, or misconfiguration is required.\n\n### Patches\n\nHeader-schema names are now normalized across all schema positions (`properties`, `required`, `dependencies`, `dependentRequired`, `dependentSchemas`, and nested subschemas). Patched in fastify `5.12.2`","public_affected_ranges":["< 5.12.2"]}],"null_published_at":"2026-11-06T00:29:57.322Z","source_updated_at":"2026-09-30T23:44:29.000Z","source_disclosed_at":"2026-09-30T23:44:27.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-11-01T07:22:52.960Z"},{"id":"NVI-00012909","kind":"vulnerability","title":"fastify vulnerable to header validation bypass via incomplete schema case normalization","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-9q9j-q6p8-xq58","CVE-2026-84428"],"plain_summary":"GitHub lists this reviewed advisory for fastify. 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-24f2858bcdcc0449d6626838e19a7682"],"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":"2026-09-30T23:44:29.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-045cd6d3a64702c527f68e089f8ca929"},{"kind":"CVSS","as_of":"2026-09-15T19:54:32.420Z","value":"7.5 HIGH (3.1)","meaning":"ce714d77-add3-4f53-aff5-83d477b104bb severity; no combined Null risk score.","source_id":"sr-24f2858bcdcc0449d6626838e19a7682"}],"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-045cd6d3a64702c527f68e089f8ca929","url":"https://github.com/advisories/GHSA-9q9j-q6p8-xq58","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9q9j-q6p8-xq58","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:22:52.960Z"},{"id":"sr-24f2858bcdcc0449d6626838e19a7682","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84428","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-84428","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-04T09:59:21.684Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-045cd6d3a64702c527f68e089f8ca929"],"technology":"fastify","known_exclusions":[],"conditions_summary":"### Impact\n\nFastify lowercases header-schema property names before compiling the schema, because Node.js stores request header names in lowercase. That normalization was incomplete: it lowercased only top-level `properties` keys and the root `required` array, and did not lowercase the JSON Schema Draft 7 `dependencies` keyword (its trigger keys and dependent property names) or names in nested subschemas. As a result, a header schema that uses `dependencies` to require one header when another is present (for example `X-Admin` requiring `X-Admin-Token`) never matches the lowercased request headers, so the dependency assertion is silently skipped. An unauthenticated remote client can send the header that activates a privileged path while omitting the header the dependency was meant to require, bypassing a schema-enforced security control. The header schema is idiomatic, valid JSON Schema Draft 7, and no custom validator, malformed request, or misconfiguration is required.\n\n### Patches\n\nHeader-schema names are now normalized across all schema positions (`properties`, `required`, `dependencies`, `dependentRequired`, `dependentSchemas`, and nested subschemas). Patched in fastify `5.12.2`","public_affected_ranges":["< 5.12.2"]}],"null_published_at":"2026-11-04T10:04:35.921Z","source_updated_at":"2026-09-30T23:44:29.000Z","source_disclosed_at":"2026-09-30T23:44:27.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-01T07:22:52.960Z"},{"id":"NVI-00012909","kind":"vulnerability","title":"fastify vulnerable to header validation bypass via incomplete schema case normalization","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-9q9j-q6p8-xq58","CVE-2026-84428"],"plain_summary":"GitHub lists this reviewed advisory for fastify. 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-045cd6d3a64702c527f68e089f8ca929"],"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":"2026-09-30T23:44:29.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-045cd6d3a64702c527f68e089f8ca929"}],"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-045cd6d3a64702c527f68e089f8ca929","url":"https://github.com/advisories/GHSA-9q9j-q6p8-xq58","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9q9j-q6p8-xq58","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:22:52.960Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-045cd6d3a64702c527f68e089f8ca929"],"technology":"fastify","known_exclusions":[],"conditions_summary":"### Impact\n\nFastify lowercases header-schema property names before compiling the schema, because Node.js stores request header names in lowercase. That normalization was incomplete: it lowercased only top-level `properties` keys and the root `required` array, and did not lowercase the JSON Schema Draft 7 `dependencies` keyword (its trigger keys and dependent property names) or names in nested subschemas. As a result, a header schema that uses `dependencies` to require one header when another is present (for example `X-Admin` requiring `X-Admin-Token`) never matches the lowercased request headers, so the dependency assertion is silently skipped. An unauthenticated remote client can send the header that activates a privileged path while omitting the header the dependency was meant to require, bypassing a schema-enforced security control. The header schema is idiomatic, valid JSON Schema Draft 7, and no custom validator, malformed request, or misconfiguration is required.\n\n### Patches\n\nHeader-schema names are now normalized across all schema positions (`properties`, `required`, `dependencies`, `dependentRequired`, `dependentSchemas`, and nested subschemas). Patched in fastify `5.12.2`","public_affected_ranges":["< 5.12.2"]}],"null_published_at":"2026-11-01T07:29:12.901Z","source_updated_at":"2026-09-30T23:44:29.000Z","source_disclosed_at":"2026-09-30T23:44:27.000Z","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":"2026-11-01T07:22:52.960Z"}],"next_cursor":null,"snapshot_revision":"42594"}