{"items":[{"id":"NVI-00016003","kind":"vulnerability","title":"Better Auth: OAuth refresh-token replay via missing client authentication on oidc-provider and mcp plugins","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-pw9m-5jxm-xr6h","CVE-2026-53512"],"plain_summary":"GitHub lists this reviewed advisory for better-auth. 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-03ff57f5c1429dc50bb634f5125a1f7b"],"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":"2026-07-20T19:24:32.000Z","value":"9.1 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-018c156ebb84e7a02d64a6b461cebed2"},{"kind":"CVSS","as_of":"2026-07-21T13:33:47.543Z","value":"9.1 CRITICAL (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-03ff57f5c1429dc50bb634f5125a1f7b"},{"kind":"CVSS","as_of":"2026-07-21T13:33:47.543Z","value":"9.1 CRITICAL (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-03ff57f5c1429dc50bb634f5125a1f7b"}],"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-018c156ebb84e7a02d64a6b461cebed2","url":"https://github.com/advisories/GHSA-pw9m-5jxm-xr6h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-pw9m-5jxm-xr6h","publisher":"GitHub Advisory Database","observed_at":"2026-11-04T02:49:06.528Z"},{"id":"sr-03ff57f5c1429dc50bb634f5125a1f7b","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53512","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-53512","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T01:48:05.462Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-018c156ebb84e7a02d64a6b461cebed2"],"technology":"better-auth","known_exclusions":[],"conditions_summary":"### Am I affected?\n\nUsers are affected if all of the following are true:\n\n- Their application uses `better-auth` and has enabled at least one of: `oidcProvider()` (imported from `better-auth/plugins/oidc-provider`), or `mcp()` (imported from `better-auth/plugins/mcp`).\n- Their application has at least one confidential OAuth client registered (any client with `type: \"web\" | \"native\" | \"user-agent-based\"` in the `oauthApplication` table, or any `trustedClients` entry without `type: \"public\"`). Public clients with PKCE are not affected.\n- Their application uses `better-auth` at a version below the patched release.\n\nIf an application only uses `@better-auth/oauth-provider` (the canonical replacement for `oidc-provider`) and the `mcp` plugin is not enabled, it is not affected.\n\nFix:\n\n1. Upgrade to `better-auth@1.6.11` or later.\n2. Migrate from the deprecated `oidcProvider()` to `@better-auth/oauth-provider` when feasible. The new package enforces client authentication on both grants by default.\n3. If developers cannot upgrade their applications, see workarounds below.\n\n### Summary\n\nThe legacy `oidcProvider` and `mcp` plugins each expose an OAuth 2.0 token endpoint whose `refresh_token` ","public_affected_ranges":["< 1.6.11"]}],"null_published_at":"2026-11-08T19:53:44.016Z","source_updated_at":"2026-07-20T19:24:32.000Z","source_disclosed_at":"2026-07-07T20:11:50.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-04T02:49:06.528Z"},{"id":"NVI-00016003","kind":"vulnerability","title":"Better Auth: OAuth refresh-token replay via missing client authentication on oidc-provider and mcp plugins","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-pw9m-5jxm-xr6h","CVE-2026-53512"],"plain_summary":"GitHub lists this reviewed advisory for better-auth. 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-018c156ebb84e7a02d64a6b461cebed2"],"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":"2026-07-20T19:24:32.000Z","value":"9.1 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-018c156ebb84e7a02d64a6b461cebed2"}],"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-018c156ebb84e7a02d64a6b461cebed2","url":"https://github.com/advisories/GHSA-pw9m-5jxm-xr6h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-pw9m-5jxm-xr6h","publisher":"GitHub Advisory Database","observed_at":"2026-11-04T02:49:06.528Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-018c156ebb84e7a02d64a6b461cebed2"],"technology":"better-auth","known_exclusions":[],"conditions_summary":"### Am I affected?\n\nUsers are affected if all of the following are true:\n\n- Their application uses `better-auth` and has enabled at least one of: `oidcProvider()` (imported from `better-auth/plugins/oidc-provider`), or `mcp()` (imported from `better-auth/plugins/mcp`).\n- Their application has at least one confidential OAuth client registered (any client with `type: \"web\" | \"native\" | \"user-agent-based\"` in the `oauthApplication` table, or any `trustedClients` entry without `type: \"public\"`). Public clients with PKCE are not affected.\n- Their application uses `better-auth` at a version below the patched release.\n\nIf an application only uses `@better-auth/oauth-provider` (the canonical replacement for `oidc-provider`) and the `mcp` plugin is not enabled, it is not affected.\n\nFix:\n\n1. Upgrade to `better-auth@1.6.11` or later.\n2. Migrate from the deprecated `oidcProvider()` to `@better-auth/oauth-provider` when feasible. The new package enforces client authentication on both grants by default.\n3. If developers cannot upgrade their applications, see workarounds below.\n\n### Summary\n\nThe legacy `oidcProvider` and `mcp` plugins each expose an OAuth 2.0 token endpoint whose `refresh_token` ","public_affected_ranges":["< 1.6.11"]}],"null_published_at":"2026-11-04T10:04:27.861Z","source_updated_at":"2026-07-20T19:24:32.000Z","source_disclosed_at":"2026-07-07T20:11:50.000Z","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":"2026-11-04T02:49:06.528Z"}],"next_cursor":null,"snapshot_revision":"42594"}