diff --git a/reports/GO-2021-0157.yaml b/reports/GO-2021-0157.yaml
new file mode 100644
index 0000000..9657244
--- /dev/null
+++ b/reports/GO-2021-0157.yaml
@@ -0,0 +1,19 @@
+module: std
+package: net/textproto
+versions:
+- fixed: go1.4.3
+description: |
+  The MIME header parser treated spaces and hyphens
+  as equivalent, which can permit HTTP request smuggling.
+published: 2022-01-05T20:00:00Z
+cves:
+- CVE-2015-5739
+credit: Régis Leroy
+symbols:
+- CanonicalMIMEHeaderKey
+- canonicalMIMEHeaderKey
+links:
+  pr: https://go.dev/cl/11772
+  commit: https://go.googlesource.com/go/+/117ddcb83d7f42d6aa72241240af99ded81118e9
+  context:
+  - https://groups.google.com/g/golang-announce/c/iSIyW4lM4hY/m/ADuQR4DiDwAJ