  Euclidean wormhole geometries sourced by axions and dilatons are puzzling
objects in quantum gravity. From one side of the wormhole to the other, the
scalar fields traverse a few Planck lengths in field space and so corrections
from the UV might potentially affect the consistency of the solution, even when
the wormholes are large. Motivated by this, we carry out the first explicit 10d
lifts of regular Euclidean axion wormholes. We start off with the lift of
Giddings-Strominger wormholes in $N=8$ Euclidean supergravity over a 6-torus to
10d type IIA supergravity and find the solution can be everywhere tuned into
the parametrically controlled supergravity regime. Secondly, we construct
explicit wormholes in AdS spaces and find them again to be under parametric
control. We find the first wormhole solutions in massive type IIA on $S^3\times
S^3$ and in type IIB on $T^{1,1}$. The latter has an explicit holographic dual,
and similar to the earlier constructions in $AdS_5 \times S^5/Z_k$, the
wormholes violate operator positivity since $Tr(F\pm{\star F})^2<0$. This
puzzle might arise from subtleties related to computing holographic $n$-point
functions in the presence of multiple boundaries.
