diff --git a/docs/reference/notifications/notification.proto b/docs/reference/notifications/notification.proto
index 940a09fe..3f740376 100644
--- a/docs/reference/notifications/notification.proto
+++ b/docs/reference/notifications/notification.proto
@@ -224,6 +224,9 @@ message Vulnerability {
   optional double cvss_v4 = 19 [json_name = "cvssv4"];
   optional string cvss_v4_vector = 20 [json_name = "cvssV4Vector"];
 
+  // Whether the vulnerability is known to be exploited.
+  optional bool is_kev = 21 [json_name = "isKev"];
+
   message Alias {
     string id = 1 [json_name = "vulnId"];
     string source = 2;
diff --git a/docs/reference/notifications/schema.md b/docs/reference/notifications/schema.md
index 8cc6360c..183a7ca2 100644
--- a/docs/reference/notifications/schema.md
+++ b/docs/reference/notifications/schema.md
@@ -967,6 +967,7 @@ Subject for GROUP_NEW_VULNERABILITIES_SUMMARY notifications.
 | `owasp_rr_vector` | `string` |  | - |
 | `cvss_v4` | `double` |  | - |
 | `cvss_v4_vector` | `string` |  | - |
+| `is_kev` | `bool` | Whether the vulnerability is known to be exploited. | - |
 
 
 
diff --git a/docs/reference/policies/schema.md b/docs/reference/policies/schema.md
index 6563b06a..324db66b 100644
--- a/docs/reference/policies/schema.md
+++ b/docs/reference/policies/schema.md
@@ -233,6 +233,7 @@
 | `epss_percentile` | `double` |  | - |
 | `cvssv4_vector` | `string` |  | - |
 | `cvssv4_score` | `double` |  | - |
+| `is_kev` | `bool` | Whether the vulnerability is known to be exploited. | - |