Seeing a dream where you are stealing something or witnessing a theft could have different meanings depending upon the things stolen as per Islam.
1- Stealing and then spending the money in a dream means that the person will be caught for the wrongdoings he is doing in the real life.
2- Seeing a dream where you have an intention to steal but eventually do not steal means that the dreamer would get sick and then recover from it.
3- Seeing theft in your own house in a dream is a sign that danger, sorrow, or worries are to hit the dreamer.
4- According to Ibrahim Karmani رحمة الله عليه, being abducted by a thief in a dream is also an indication of worries and sorrow.
5- According to Prophet Daniyal عليه السلام, seeing theft in a dream is a sign of dishonesty and trust-breaking.