diff --git a/src/oauth/log.ts b/src/oauth/log.ts
index 275530e19..2cd710d71 100644
--- a/src/oauth/log.ts
+++ b/src/oauth/log.ts
@@ -1,5 +1,6 @@
 // src/oauth/log.ts
 import { maskAccountId } from "../lib/privacy";
+import { redactSecretString } from "../lib/redact";
 
 /** Normalize camelCase / snake_case / kebab-case field names before secret checks. */
 function normalizeFieldKey(key: string): string {
@@ -20,6 +21,7 @@ const FORBIDDEN_NORMALIZED = new Set([
   "id_token",
   "client_secret",
   "oauth_code",
+  "code_verifier",
   "clientsecret",
 ]);
 
@@ -44,5 +46,5 @@ export function logOAuthEvent(
     if (value === undefined) continue;
     parts.push(`${key}=${String(value)}`);
   }
-  console.info(parts.join(" "));
+  console.info(redactSecretString(parts.join(" ")));
 }
diff --git a/tests/oauth-log.test.ts b/tests/oauth-log.test.ts
index 8d88519e7..2bd673839 100644
--- a/tests/oauth-log.test.ts
+++ b/tests/oauth-log.test.ts
@@ -41,6 +41,7 @@ describe("logOAuthEvent", () => {
         id_token: "secret-id_token-value",
         client_secret: "secret-client_secret-value",
         oauth_code: "secret-oauth_code-value",
+        code_verifier: "secret-code_verifier-value",
         "client-secret": "secret-client-secret-value",
         safe: "visible",
       });
@@ -64,10 +65,31 @@ describe("logOAuthEvent", () => {
       "id_token",
       "client_secret",
       "oauth_code",
+      "code_verifier",
       "client-secret",
     ]) {
       expect(line).not.toContain(`${key}=`);
     }
     expect(line).not.toContain("secret-");
   });
+
+  test("redacts token-shaped values under otherwise safe field keys", () => {
+    const lines: string[] = [];
+    const original = console.info;
+    console.info = (msg?: unknown) => { lines.push(String(msg)); };
+    try {
+      logOAuthEvent("OAuth request failed", {
+        provider: "kiro",
+        diagnostic: "upstream returned Bearer credentialvalue123456",
+        request: "sk-fixturecredential",
+        status: 401,
+      });
+    } finally {
+      console.info = original;
+    }
+
+    expect(lines).toEqual([
+      "[opencodex] OAuth request failed provider=kiro diagnostic=upstream returned Bearer [REDACTED] request=[REDACTED] status=401",
+    ]);
+  });
 });