diff --git a/Lib/http/cookies.py b/Lib/http/cookies.py
index 351faf428a20cd..9ee50cdccaae63 100644
--- a/Lib/http/cookies.py
+++ b/Lib/http/cookies.py
@@ -184,51 +184,29 @@ def _quote(str):
         return '"' + str.translate(_Translator) + '"'
 
 
-_OctalPatt = re.compile(r"\\[0-3][0-7][0-7]")
-_QuotePatt = re.compile(r"[\\].")
+_OctalPatt = re.compile(r"\\([0-3][0-7][0-7])")
+_QuotePatt = re.compile(r'\\"')
 
 def _unquote(str):
-    # If there aren't any doublequotes,
-    # then there can't be any special characters.  See RFC 2109.
     if str is None or len(str) < 2:
         return str
     if str[0] != '"' or str[-1] != '"':
         return str
 
-    # We have to assume that we must decode this string.
-    # Down to work.
-
-    # Remove the "s
+    # Remove the surrounding quotes
     str = str[1:-1]
 
-    # Check for special sequences.  Examples:
-    #    \012 --> \n
-    #    \"   --> "
-    #
-    i = 0
-    n = len(str)
-    res = []
-    while 0 <= i < n:
-        o_match = _OctalPatt.search(str, i)
-        q_match = _QuotePatt.search(str, i)
-        if not o_match and not q_match:              # Neither matched
-            res.append(str[i:])
-            break
-        # else:
-        j = k = -1
-        if o_match:
-            j = o_match.start(0)
-        if q_match:
-            k = q_match.start(0)
-        if q_match and (not o_match or k < j):     # QuotePatt matched
-            res.append(str[i:k])
-            res.append(str[k+1])
-            i = k + 2
-        else:                                      # OctalPatt matched
-            res.append(str[i:j])
-            res.append(chr(int(str[j+1:j+4], 8)))
-            i = j + 4
-    return _nulljoin(res)
+    # Function to replace octal patterns
+    def replace_octal(match):
+        octal_value = match.group(1)
+        return chr(int(octal_value, 8))
+
+    # Replace octal escape sequences
+    str = _OctalPatt.sub(replace_octal, str)
+    # Replace escaped quotes
+    str = _QuotePatt.sub('"', str)
+
+    return str
 
 # The _getdate() routine is used to set the expiration time in the cookie's HTTP
 # header.  By default, _getdate() returns the current time in the appropriate