{"items":[{"id":"NVI-00008980","kind":"vulnerability","title":"better-auth: OAuth Proxy lets an attacker sign in as another user","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-r4xp-prcw-77qf","CVE-2026-110864"],"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-590fcdaa2fd3612a7bb1e345b1ccf9e4"],"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},{"summary":"The original advisory lists fixed boundaries 1.7.7 for better-auth. Confirm the publisher’s latest guidance.","source_ids":["sr-c628cdba748ef637a4e39d812210c88d"],"action_type":"vendor_patch","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":"2026-10-27T15:32:17.000Z","value":"7.4 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-590fcdaa2fd3612a7bb1e345b1ccf9e4"}],"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-590fcdaa2fd3612a7bb1e345b1ccf9e4","url":"https://github.com/advisories/GHSA-r4xp-prcw-77qf","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-r4xp-prcw-77qf","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:51.534Z"},{"id":"sr-c628cdba748ef637a4e39d812210c88d","url":"https://github.com/advisories/GHSA-r4xp-prcw-77qf","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-r4xp-prcw-77qf","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-11-02T20:16:56.213Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-590fcdaa2fd3612a7bb1e345b1ccf9e4"],"technology":"better-auth","known_exclusions":[],"conditions_summary":"## Am I affected?\n\nYou may be affected if you use `better-auth` from 1.5.0-beta.12 through versions before 1.7.7 with the OAuth Proxy plugin. You are affected only if **all** of these are also true:\n\n- On a participating environment, the OAuth Proxy plugin has no dedicated `secret`, or its `secret` equals that environment's global Better Auth secret.\n- Sign-in state is stored in a cookie (`account.storeStateStrategy: \"cookie\"`). With a database or secondary storage, this is only the case if you chose it explicitly.\n- Implicit account linking is on (the default).\n\nYou are not affected by this path if every participating environment uses a proxy `secret` distinct from its global Better Auth secret, if sign-in state is stored in the database, or if you use a version before 1.5.0-beta.12.\n\n## Summary\n\nThe OAuth Proxy plugin trusts any user profile it can decrypt. In the affected setup, Better Auth encrypts sign-in state, including data the caller chose, with the same secret and hands it to anyone who starts a social sign-in. An attacker can use this to get a fake profile for another user's email address that the proxy accepts as real.\n\n## Impact\n\nAn attacker without an account who know","public_affected_ranges":[">= 1.5.0-beta.12, < 1.7.7"]},{"certainty":"source_listed","source_ids":["sr-c628cdba748ef637a4e39d812210c88d"],"technology":"better-auth","known_exclusions":[],"conditions_summary":"## Am I affected?\n\nYou may be affected if you use `better-auth` from 1.5.0-beta.12 through versions before 1.7.7 with the OAuth Proxy plugin. You are affected only if **all** of these are also true:\n\n- On a participating environment, the OAuth Proxy plugin has no dedicated `secret`, or its `secret` equals that environment's global Better Auth secret.\n- Sign-in state is stored in a cookie (`account.storeStateStrategy: \"cookie\"`). With a database or secondary storage, this is only the case if you chose it explicitly.\n- Implicit account linking is on (the default).\n\nYou are not affected by this path if every participating environment uses a proxy `secret` distinct from its global Better Auth secret, if sign-in state is stored in the database, or if you use a version before 1.5.0-beta.12.\n\n## Summary\n\nThe OAuth Proxy plugin trusts any user profile it can decrypt. In the affected setup, Better Auth encrypts sign-in state, including data the caller chose, with the same secret and hands it to anyone who starts a social sign-in. An attacker can use this to get a fake profile for another user's email address that the proxy accepts as real.\n\n## Impact\n\nAn attacker without an account who know","public_affected_ranges":["SEMVER: introduced 1.5.0-beta.12; fixed 1.7.7"]}],"null_published_at":"2026-11-02T20:21:10.349Z","source_updated_at":"2026-10-27T15:32:17.000Z","source_disclosed_at":"2026-10-27T15:32:16.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:56:51.534Z"},{"id":"NVI-00008980","kind":"vulnerability","title":"better-auth: OAuth Proxy lets an attacker sign in as another user","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-r4xp-prcw-77qf"],"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-590fcdaa2fd3612a7bb1e345b1ccf9e4"],"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":"2026-10-27T15:32:17.000Z","value":"7.4 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-590fcdaa2fd3612a7bb1e345b1ccf9e4"}],"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-590fcdaa2fd3612a7bb1e345b1ccf9e4","url":"https://github.com/advisories/GHSA-r4xp-prcw-77qf","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-r4xp-prcw-77qf","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:51.534Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-590fcdaa2fd3612a7bb1e345b1ccf9e4"],"technology":"better-auth","known_exclusions":[],"conditions_summary":"## Am I affected?\n\nYou may be affected if you use `better-auth` from 1.5.0-beta.12 through versions before 1.7.7 with the OAuth Proxy plugin. You are affected only if **all** of these are also true:\n\n- On a participating environment, the OAuth Proxy plugin has no dedicated `secret`, or its `secret` equals that environment's global Better Auth secret.\n- Sign-in state is stored in a cookie (`account.storeStateStrategy: \"cookie\"`). With a database or secondary storage, this is only the case if you chose it explicitly.\n- Implicit account linking is on (the default).\n\nYou are not affected by this path if every participating environment uses a proxy `secret` distinct from its global Better Auth secret, if sign-in state is stored in the database, or if you use a version before 1.5.0-beta.12.\n\n## Summary\n\nThe OAuth Proxy plugin trusts any user profile it can decrypt. In the affected setup, Better Auth encrypts sign-in state, including data the caller chose, with the same secret and hands it to anyone who starts a social sign-in. An attacker can use this to get a fake profile for another user's email address that the proxy accepts as real.\n\n## Impact\n\nAn attacker without an account who know","public_affected_ranges":[">= 1.5.0-beta.12, < 1.7.7"]}],"null_published_at":"2026-10-31T22:13:27.125Z","source_updated_at":"2026-10-27T15:32:17.000Z","source_disclosed_at":"2026-10-27T15:32:16.000Z","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":"2026-10-31T21:56:51.534Z"}],"next_cursor":null,"snapshot_revision":"42594"}