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Invalid JSON error on mailbox search #7034

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Invalid JSON error on mailbox search#7034
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@ckibodeaux

Description

@ckibodeaux
ckibodeaux
opened on Jan 30, 2026

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Description

Image Image When under mailbox configuration, using the search box creates an error. Search box works on other pages.

Steps to reproduce:

  1. Login to admin panel.
  2. Navigate to mailbox configuration.
  3. Start typing in the search box.

Logs:

nginx-mailcow-1  | 70.182.11.158 - - [30/Jan/2026:00:29:43 -0600] "GET /api/v1/get/mailbox/datatables?draw=4&columns%5B0%5D%5Bdata%5D=&columns%5B0%5D%5Bname%5D=&columns%5B0%5D%5Bsearchable%5D=false&columns%5B0%5D%5Borderable%5D=false&columns%5B0%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B0%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B1%5D%5Bdata%5D=chkbox&columns%5B1%5D%5Bname%5D=&columns%5B1%5D%5Bsearchable%5D=false&columns%5B1%5D%5Borderable%5D=false&columns%5B1%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B1%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B2%5D%5Bdata%5D=username&columns%5B2%5D%5Bname%5D=&columns%5B2%5D%5Bsearchable%5D=true&columns%5B2%5D%5Borderable%5D=true&columns%5B2%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B2%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B3%5D%5Bdata%5D=quota.value&columns%5B3%5D%5Bname%5D=&columns%5B3%5D%5Bsearchable%5D=false&columns%5B3%5D%5Borderable%5D=true&columns%5B3%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B3%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B4%5D%5Bdata%5D=last_mail_login&columns%5B4%5D%5Bname%5D=&columns%5B4%5D%5Bsearchable%5D=false&columns%5B4%5D%5Borderable%5D=true&columns%5B4%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B4%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B5%5D%5Bdata%5D=last_pw_change&columns%5B5%5D%5Bname%5D=&columns%5B5%5D%5Bsearchable%5D=false&columns%5B5%5D%5Borderable%5D=true&columns%5B5%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B5%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B6%5D%5Bdata%5D=in_use.value&columns%5B6%5D%5Bname%5D=&columns%5B6%5D%5Bsearchable%5D=false&columns%5B6%5D%5Borderable%5D=true&columns%5B6%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B6%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B7%5D%5Bdata%5D=name&columns%5B7%5D%5Bname%5D=&columns%5B7%5D%5Bsearchable%5D=true&columns%5B7%5D%5Borderable%5D=true&columns%5B7%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B7%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B8%5D%5Bdata%5D=domain&columns%5B8%5D%5Bname%5D=&columns%5B8%5D%5Bsearchable%5D=true&columns%5B8%5D%5Borderable%5D=true&columns%5B8%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B8%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B9%5D%5Bdata%5D=authsource&columns%5B9%5D%5Bname%5D=&columns%5B9%5D%5Bsearchable%5D=true&columns%5B9%5D%5Borderable%5D=true&columns%5B9%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B9%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B10%5D%5Bdata%5D=tls_enforce_in&columns%5B10%5D%5Bname%5D=&columns%5B10%5D%5Bsearchable%5D=true&columns%5B10%5D%5Borderable%5D=true&columns%5B10%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B10%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B11%5D%5Bdata%5D=tls_enforce_out&columns%5B11%5D%5Bname%5D=&columns%5B11%5D%5Bsearchable%5D=true&columns%5B11%5D%5Borderable%5D=true&columns%5B11%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B11%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B12%5D%5Bdata%5D=smtp_access&columns%5B12%5D%5Bname%5D=&columns%5B12%5D%5Bsearchable%5D=true&columns%5B12%5D%5Borderable%5D=true&columns%5B12%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B12%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B13%5D%5Bdata%5D=imap_access&columns%5B13%5D%5Bname%5D=&columns%5B13%5D%5Bsearchable%5D=true&columns%5B13%5D%5Borderable%5D=true&columns%5B13%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B13%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B14%5D%5Bdata%5D=pop3_access&columns%5B14%5D%5Bname%5D=&columns%5B14%5D%5Bsearchable%5D=true&columns%5B14%5D%5Borderable%5D=true&columns%5B14%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B14%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B15%5D%5Bdata%5D=sieve_access&columns%5B15%5D%5Bname%5D=&columns%5B15%5D%5Bsearchable%5D=true&columns%5B15%5D%5Borderable%5D=true&columns%5B15%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B15%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B16%5D%5Bdata%5D=eas_access&columns%5B16%5D%5Bname%5D=&columns%5B16%5D%5Bsearchable%5D=true&columns%5B16%5D%5Borderable%5D=true&columns%5B16%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B16%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B17%5D%5Bdata%5D=dav_access&columns%5B17%5D%5Bname%5D=&columns%5B17%5D%5Bsearchable%5D=true&columns%5B17%5D%5Borderable%5D=true&columns%5B17%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B17%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B18%5D%5Bdata%5D=quarantine_notification&columns%5B18%5D%5Bname%5D=&columns%5B18%5D%5Bsearchable%5D=true&columns%5B18%5D%5Borderable%5D=true&columns%5B18%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B18%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B19%5D%5Bdata%5D=quarantine_category&columns%5B19%5D%5Bname%5D=&columns%5B19%5D%5Bsearchable%5D=true&columns%5B19%5D%5Borderable%5D=true&columns%5B19%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B19%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B20%5D%5Bdata%5D=messages&columns%5B20%5D%5Bname%5D=&columns%5B20%5D%5Bsearchable%5D=false&columns%5B20%5D%5Borderable%5D=true&columns%5B20%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B20%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B21%5D%5Bdata%5D=created&columns%5B21%5D%5Bname%5D=&columns%5B21%5D%5Bsearchable%5D=true&columns%5B21%5D%5Borderable%5D=true&columns%5B21%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B21%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B22%5D%5Bdata%5D=modified&columns%5B22%5D%5Bname%5D=&columns%5B22%5D%5Bsearchable%5D=true&columns%5B22%5D%5Borderable%5D=true&columns%5B22%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B22%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B23%5D%5Bdata%5D=tags&columns%5B23%5D%5Bname%5D=&columns%5B23%5D%5Bsearchable%5D=true&columns%5B23%5D%5Borderable%5D=true&columns%5B23%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B23%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B24%5D%5Bdata%5D=active&columns%5B24%5D%5Bname%5D=&columns%5B24%5D%5Bsearchable%5D=false&columns%5B24%5D%5Borderable%5D=true&columns%5B24%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B24%5D%5Bsearch%5D%5Bregex%5D=false&columns%5B25%5D%5Bdata%5D=action&columns%5B25%5D%5Bname%5D=&columns%5B25%5D%5Bsearchable%5D=false&columns%5B25%5D%5Borderable%5D=false&columns%5B25%5D%5Bsearch%5D%5Bvalue%5D=&columns%5B25%5D%5Bsearch%5D%5Bregex%5D=false&order%5B0%5D%5Bcolumn%5D=2&order%5B0%5D%5Bdir%5D=asc&start=0&length=25&search%5Bvalue%5D=l&search%5Bregex%5D=false&_=1769754318161 HTTP/2.0" 200 20 "https://mailcow.mailsynergy.net/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/144.0.0.0 Safari/537.36"

Which branch are you using?

master (stable)

Which architecture are you using?

x86_64

Operating System:

Debian GNU/Linux 12 (bookworm)

Server/VM specifications:

4 CPU, 8 GB RAM

Is Apparmor, SELinux or similar active?

yes

Virtualization technology:

KVM

Docker version:

29.2.0

docker-compose version or docker compose version:

v5.0.2

mailcow version:

2026-01

Reverse proxy:

none

Logs of git diff:

Only SSL cert

Logs of iptables -L -vn:

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain FORWARD (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
 103K   43M MAILCOW    0    --  *      *       0.0.0.0/0            0.0.0.0/0            /* mailcow */
 103K   43M DOCKER-USER  0    --  *      *       0.0.0.0/0            0.0.0.0/0           
 103K   43M DOCKER-FORWARD  0    --  *      *       0.0.0.0/0            0.0.0.0/0           

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain DOCKER (2 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.253         tcp dpt:587
    8   464 ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.253         tcp dpt:465
   14   808 ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.253         tcp dpt:25
    0     0 ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:12345
    0     0 ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:4190
    0     0 ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:995
   80  4844 ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:993
    3   160 ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:143
    0     0 ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:110
    0     0 ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.11          tcp dpt:3306
    0     0 ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.249         tcp dpt:6379
 5113  277K ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.7           tcp dpt:443
 1201 71836 ACCEPT     6    --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.7           tcp dpt:80
    0     0 DROP       0    --  !br-mailcow br-mailcow  0.0.0.0/0            0.0.0.0/0           
    0     0 DROP       0    --  !docker0 docker0  0.0.0.0/0            0.0.0.0/0           

Chain DOCKER-BRIDGE (1 references)
 pkts bytes target     prot opt in     out     source               destination         
 6431  356K DOCKER     0    --  *      br-mailcow  0.0.0.0/0            0.0.0.0/0           
    0     0 DOCKER     0    --  *      docker0  0.0.0.0/0            0.0.0.0/0           

Chain DOCKER-CT (1 references)
 pkts bytes target     prot opt in     out     source               destination         
36789   11M ACCEPT     0    --  *      br-mailcow  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
    0     0 ACCEPT     0    --  *      docker0  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED

Chain DOCKER-FORWARD (1 references)
 pkts bytes target     prot opt in     out     source               destination         
 103K   43M DOCKER-CT  0    --  *      *       0.0.0.0/0            0.0.0.0/0           
65761   33M DOCKER-INTERNAL  0    --  *      *       0.0.0.0/0            0.0.0.0/0           
65761   33M DOCKER-BRIDGE  0    --  *      *       0.0.0.0/0            0.0.0.0/0           
59330   32M ACCEPT     0    --  br-mailcow *       0.0.0.0/0            0.0.0.0/0           
    0     0 ACCEPT     0    --  docker0 *       0.0.0.0/0            0.0.0.0/0           

Chain DOCKER-INTERNAL (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain DOCKER-USER (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain MAILCOW (1 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DROP       6    --  !br-mailcow br-mailcow  0.0.0.0/0            0.0.0.0/0            /* mailcow isolation */

Logs of ip6tables -L -vn:

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain FORWARD (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 MAILCOW    0    --  *      *       ::/0                 ::/0                 /* mailcow */
    0     0 DOCKER-USER  0    --  *      *       ::/0                 ::/0                
    0     0 DOCKER-FORWARD  0    --  *      *       ::/0                 ::/0                

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain DOCKER (1 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DROP       0    --  !docker0 docker0  ::/0                 ::/0                

Chain DOCKER-BRIDGE (1 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DOCKER     0    --  *      docker0  ::/0                 ::/0                

Chain DOCKER-CT (1 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 ACCEPT     0    --  *      docker0  ::/0                 ::/0                 ctstate RELATED,ESTABLISHED

Chain DOCKER-FORWARD (1 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DOCKER-CT  0    --  *      *       ::/0                 ::/0                
    0     0 DOCKER-INTERNAL  0    --  *      *       ::/0                 ::/0                
    0     0 DOCKER-BRIDGE  0    --  *      *       ::/0                 ::/0                
    0     0 ACCEPT     0    --  docker0 *       ::/0                 ::/0                

Chain DOCKER-INTERNAL (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain DOCKER-USER (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain MAILCOW (1 references)
 pkts bytes target     prot opt in     out     source               destination

Logs of iptables -L -vn -t nat:

Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
 6575  363K DOCKER     0    --  *      *       0.0.0.0/0            0.0.0.0/0            ADDRTYPE match dst-type LOCAL

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DOCKER     0    --  *      *       0.0.0.0/0           !127.0.0.0/8          ADDRTYPE match dst-type LOCAL

Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 MASQUERADE  0    --  *      !docker0  172.17.0.0/16        0.0.0.0/0           
 4868  367K MASQUERADE  0    --  *      !br-mailcow  172.22.1.0/24        0.0.0.0/0           

Chain DOCKER (2 references)
 pkts bytes target     prot opt in     out     source               destination         
 1203 71944 DNAT       6    --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:80 to:172.22.1.7:80
 5199  281K DNAT       6    --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:443 to:172.22.1.7:443
    0     0 DNAT       6    --  !br-mailcow *       0.0.0.0/0            127.0.0.1            tcp dpt:7654 to:172.22.1.249:6379
    0     0 DNAT       6    --  !br-mailcow *       0.0.0.0/0            127.0.0.1            tcp dpt:13306 to:172.22.1.11:3306
    0     0 DNAT       6    --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:110 to:172.22.1.250:110
    3   160 DNAT       6    --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:143 to:172.22.1.250:143
   80  4844 DNAT       6    --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:993 to:172.22.1.250:993
    0     0 DNAT       6    --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:995 to:172.22.1.250:995
    0     0 DNAT       6    --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:4190 to:172.22.1.250:4190
    0     0 DNAT       6    --  !br-mailcow *       0.0.0.0/0            127.0.0.1            tcp dpt:19991 to:172.22.1.250:12345
   15   868 DNAT       6    --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:25 to:172.22.1.253:25
    8   464 DNAT       6    --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:465 to:172.22.1.253:465
    0     0 DNAT       6    --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:587 to:172.22.1.253:587

Logs of ip6tables -L -vn -t nat:

Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DOCKER     0    --  *      *       ::/0                 ::/0                 ADDRTYPE match dst-type LOCAL

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DOCKER     0    --  *      *       ::/0                !::1                  ADDRTYPE match dst-type LOCAL

Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 MASQUERADE  0    --  *      !docker0  fd00:dead:beef:c0::/80  ::/0                

Chain DOCKER (2 references)
 pkts bytes target     prot opt in     out     source               destination

DNS check:

198.252.206.1

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