fix: better error handling within parseCookies (#3720)

packages/payload/src/utilities/parseCookies.ts

@@ -1,5 +1,7 @@
 import type { Request } from 'express'
 
+import { APIError } from '../errors'
+
 export default function parseCookies(req: Request): { [key: string]: string } {
   const list = {}
   const rc = req.headers.cookie
@@ -7,7 +9,15 @@ export default function parseCookies(req: Request): { [key: string]: string } {
   if (rc) {
     rc.split(';').forEach((cookie) => {
       const parts = cookie.split('=')
-      list[parts.shift().trim()] = decodeURI(parts.join('='))
+      const key = parts.shift().trim()
+      const encodedValue = parts.join('=')
+
+      try {
+        const decodedValue = decodeURI(encodedValue)
+        list[key] = decodedValue
+      } catch (e) {
+        throw new APIError(`Error decoding cookie value for key ${key}: ${e.message}`)
+      }
     })
   }