There is 1 open security issue in buster.
1 issue left for the package maintainer to handle:
A memory corruption vulnerability is present in bspatch as shipped in Colin Percival’s bsdiff tools version 4.3. Insufficient checks when handling external inputs allows an attacker to bypass the sanity checks in place and write out of a dynamically allocated buffer boundaries.
You can find information about how to handle this issue in the security team's documentation.