1 files changed, 6 insertions, 2 deletions
diff --git a/Mailman/SecurityManager.py b/Mailman/SecurityManager.py
index 00f599aa1..af8e6b071 100644
--- a/Mailman/SecurityManager.py
+++ b/Mailman/SecurityManager.py
@@ -338,6 +338,10 @@ splitter = re.compile(';\s*')
 def parsecookie(s):
     c = {}
     for p in splitter.split(s):
-        k, v = p.split('=')
-        c[k] = v
+        try:
+            k, v = p.split('=', 1)
+        except ValueError:
+            pass
+        else:
+            c[k] = v
     return c