diff --git a/gems/sisimai/CVE-2022-4891.yml b/gems/sisimai/CVE-2022-4891.yml
index 1f1fb42853..e785817b24 100644
--- a/gems/sisimai/CVE-2022-4891.yml
+++ b/gems/sisimai/CVE-2022-4891.yml
@@ -12,6 +12,7 @@ description: |
   has been disclosed to the public and may be used. Upgrading to version 4.25.14p12
   is able to address this issue. The name of the patch is 51fe2e6521c9c02b421b383943dc9e4bbbe65d4e.
   It is recommended to upgrade the affected component.
+cvss_v3: 4.3
 patched_versions:
   - ">= 4.25.14p12"
 related: