When curl >= 7.20.0 and <= 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to upgrade to TLS security, the server can respond and send back multiple responses at once that curl caches. curl would then upgrade to TL…

{
                    "vendor": "n/a",
                    "product": "https://github.com/curl/curl",
                    "versions": [
                        {
                            "version": "curl 7.20.0 to and including 7.78.0",
                            "status": "affected"
                        }
                    ]
                }