A curious search reveals that vulnerabilities that do exist are of 2 flavors.

1. Standard C memory vulnerabilities

2. Unsafe file traversal while unzipping

The entire second class is avoided in a fixed file format. The first class of vulnerabilities plague everything. A quick look at libxml2 CVEs shows that.

and the zip bombs you mentioned! i keep a dummy SD card with one hehe.

but yeah the first class of vulns is why we have advice like don’t run untrusted input, which is not dissimilar to “don’t unzip untrusted payloads”.