[exim] Taint mismatch, string_vformat: route_finduser 1143

Hi,

When ever i try to send an email, it fails with following log

...
...
31420 checking for local user
31420 seeking password data for user "gowtham": cache not available
31420 LOG: MAIN PANIC DIE
31420 Taint mismatch, string_vformat: route_finduser 1143
31420
31420 SMTP>> 421 Unexpected failure, please try later
31420 tls_write(0x55b603b040, 42)
31420 SSL_write(0x55b6089340, 0x55b603b040, 42)
31420 outbytes=42 error=0
31420 Calling SSL_read(0x55b6089340, 0x55b6098fe0, 4096)
31420 SMTP<< QUIT
31420 SMTP>> 221 ferryfair.com closing connection
31420 tls_write(0x55b603b040, 38)
31420 SSL_write(0x55b6089340, 0x55b603b040, 38)
31420 outbytes=38 error=0
31420 search_tidyup called
31420 >>>>>>>>>>>>>>>> Exim pid=31420 NULLterminating with rc=1 >>>>>>>>>>>>>>> >
31411 child 31420 ended: status=0x100
31411 normal exit, 1
31411 0 SMTP accept processes now running
31411 Listening...
...
...

exim-4.93.0.4

… Gowtham