diff --git a/packages/core/src/core/geminiChat_network_retry.test.ts b/packages/core/src/core/geminiChat_network_retry.test.ts
index 4683e29261..83d5848e75 100644
--- a/packages/core/src/core/geminiChat_network_retry.test.ts
+++ b/packages/core/src/core/geminiChat_network_retry.test.ts
@@ -519,4 +519,70 @@ describe('GeminiChat Network Retries', () => {
       }),
     );
   });
+
+  it('should retry on OpenSSL 3.x SSL error during stream iteration (ERR_SSL_SSL/TLS_ALERT_BAD_RECORD_MAC)', async () => {
+    // OpenSSL 3.x produces a different error code format than OpenSSL 1.x
+    const sslError = new Error(
+      'request to https://cloudcode-pa.googleapis.com/v1internal:streamGenerateContent failed',
+    ) as NodeJS.ErrnoException & { type?: string };
+    sslError.type = 'system';
+    sslError.errno =
+      'ERR_SSL_SSL/TLS_ALERT_BAD_RECORD_MAC' as unknown as number;
+    sslError.code = 'ERR_SSL_SSL/TLS_ALERT_BAD_RECORD_MAC';
+
+    vi.mocked(mockContentGenerator.generateContentStream)
+      .mockImplementationOnce(async () =>
+        (async function* () {
+          yield {
+            candidates: [
+              { content: { parts: [{ text: 'Partial response...' }] } },
+            ],
+          } as unknown as GenerateContentResponse;
+          throw sslError;
+        })(),
+      )
+      .mockImplementationOnce(async () =>
+        (async function* () {
+          yield {
+            candidates: [
+              {
+                content: { parts: [{ text: 'Complete response after retry' }] },
+                finishReason: 'STOP',
+              },
+            ],
+          } as unknown as GenerateContentResponse;
+        })(),
+      );
+
+    const stream = await chat.sendMessageStream(
+      { model: 'test-model' },
+      'test message',
+      'prompt-id-ssl3-mid-stream',
+      new AbortController().signal,
+      LlmRole.MAIN,
+    );
+
+    const events: StreamEvent[] = [];
+    for await (const event of stream) {
+      events.push(event);
+    }
+
+    const retryEvent = events.find((e) => e.type === StreamEventType.RETRY);
+    expect(retryEvent).toBeDefined();
+
+    const successChunk = events.find(
+      (e) =>
+        e.type === StreamEventType.CHUNK &&
+        e.value.candidates?.[0]?.content?.parts?.[0]?.text ===
+          'Complete response after retry',
+    );
+    expect(successChunk).toBeDefined();
+
+    expect(mockLogNetworkRetryAttempt).toHaveBeenCalledWith(
+      expect.anything(),
+      expect.objectContaining({
+        error_type: 'ERR_SSL_SSL/TLS_ALERT_BAD_RECORD_MAC',
+      }),
+    );
+  });
 });
diff --git a/packages/core/src/utils/retry.test.ts b/packages/core/src/utils/retry.test.ts
index a5b5a8b657..29758e6e92 100644
--- a/packages/core/src/utils/retry.test.ts
+++ b/packages/core/src/utils/retry.test.ts
@@ -511,6 +511,40 @@ describe('retryWithBackoff', () => {
       expect(mockFn).toHaveBeenCalledTimes(2);
     });
 
+    it('should retry on OpenSSL 3.x SSL error code (ERR_SSL_SSL/TLS_ALERT_BAD_RECORD_MAC)', async () => {
+      const error = new Error('SSL error');
+      (error as any).code = 'ERR_SSL_SSL/TLS_ALERT_BAD_RECORD_MAC';
+      const mockFn = vi
+        .fn()
+        .mockRejectedValueOnce(error)
+        .mockResolvedValue('success');
+
+      const promise = retryWithBackoff(mockFn, {
+        initialDelayMs: 1,
+        maxDelayMs: 1,
+      });
+      await vi.runAllTimersAsync();
+      await expect(promise).resolves.toBe('success');
+      expect(mockFn).toHaveBeenCalledTimes(2);
+    });
+
+    it('should retry on unknown SSL BAD_RECORD_MAC variant via substring fallback', async () => {
+      const error = new Error('SSL error');
+      (error as any).code = 'ERR_SSL_SOME_FUTURE_BAD_RECORD_MAC';
+      const mockFn = vi
+        .fn()
+        .mockRejectedValueOnce(error)
+        .mockResolvedValue('success');
+
+      const promise = retryWithBackoff(mockFn, {
+        initialDelayMs: 1,
+        maxDelayMs: 1,
+      });
+      await vi.runAllTimersAsync();
+      await expect(promise).resolves.toBe('success');
+      expect(mockFn).toHaveBeenCalledTimes(2);
+    });
+
     it('should retry on gaxios-style SSL error with code property', async () => {
       // This matches the exact structure from issue #17318
       const error = new Error(
diff --git a/packages/core/src/utils/retry.ts b/packages/core/src/utils/retry.ts
index 46765216b9..5b3ac4f113 100644
--- a/packages/core/src/utils/retry.ts
+++ b/packages/core/src/utils/retry.ts
@@ -53,14 +53,30 @@ const RETRYABLE_NETWORK_CODES = [
   'ENOTFOUND',
   'EAI_AGAIN',
   'ECONNREFUSED',
-  // SSL/TLS transient errors
-  'ERR_SSL_SSLV3_ALERT_BAD_RECORD_MAC',
   'ERR_SSL_WRONG_VERSION_NUMBER',
-  'ERR_SSL_DECRYPTION_FAILED_OR_BAD_RECORD_MAC',
-  'ERR_SSL_BAD_RECORD_MAC',
   'EPROTO', // Generic protocol error (often SSL-related)
 ];
 
+// Node.js builds SSL error codes by prepending ERR_SSL_ to the uppercased
+// OpenSSL reason string with spaces replaced by underscores (see
+// TLSWrap::ClearOut in node/src/crypto/crypto_tls.cc). The reason string
+// format varies by OpenSSL version (e.g. ERR_SSL_SSLV3_ALERT_BAD_RECORD_MAC
+// on OpenSSL 1.x, ERR_SSL_SSL/TLS_ALERT_BAD_RECORD_MAC on OpenSSL 3.x), so
+// match the stable suffix instead of enumerating every variant.
+const RETRYABLE_SSL_ERROR_PATTERN = /^ERR_SSL_.*BAD_RECORD_MAC/i;
+
+/**
+ * Returns true if the error code should be retried: either an exact match
+ * against RETRYABLE_NETWORK_CODES, or an SSL BAD_RECORD_MAC variant (the
+ * OpenSSL reason-string portion of the code varies across OpenSSL versions).
+ */
+function isRetryableSslErrorCode(code: string): boolean {
+  return (
+    RETRYABLE_NETWORK_CODES.includes(code) ||
+    RETRYABLE_SSL_ERROR_PATTERN.test(code)
+  );
+}
+
 function getNetworkErrorCode(error: unknown): string | undefined {
   const getCode = (obj: unknown): string | undefined => {
     if (typeof obj !== 'object' || obj === null) {
@@ -112,7 +128,7 @@ export function getRetryErrorType(error: unknown): string {
   }
 
   const errorCode = getNetworkErrorCode(error);
-  if (errorCode && RETRYABLE_NETWORK_CODES.includes(errorCode)) {
+  if (errorCode && isRetryableSslErrorCode(errorCode)) {
     return errorCode;
   }
 
@@ -153,7 +169,7 @@ export function isRetryableError(
 ): boolean {
   // Check for common network error codes
   const errorCode = getNetworkErrorCode(error);
-  if (errorCode && RETRYABLE_NETWORK_CODES.includes(errorCode)) {
+  if (errorCode && isRetryableSslErrorCode(errorCode)) {
     return true;
   }