Submitted by Tointer, also found by joestakey, gz627, Jeiwan, obront, unforgiven, rvierdiiev, and chaduke
If underlying token for the vault would have less then 18 decimals, then after liquidation there would be no way to process epoch, because claim function in WithdrawProxy.sol would revert, this would lock all user out of their funds both in vault and in withdraw proxy. Alternatively, if there is more then 18 decimals, claim would leave much less funds than needed for withdraw, resulting in withdrawers losing funds.
To make report more concise, I would focus on tokens with less then 18 decimals, because they are much more frequent. For example, WBTC have 8 decimals and most stablecoins have 6.
https://github.com/code-423n4/2023-01-astaria/blob/1bfc58b42109b839528ab1c21dc9803d663df898/src/PublicVault.sol#L314-L316
this part making sure that withdraw ratio are always stored in 1e18 scale.
https://github.com/code-423n4/2023-01-astaria/blob/1bfc58b42109b839528ab1c21dc9803d663df898/src/WithdrawProxy.sol#L271-L274
but here, we are not transforming it into token decimals scale. transferAmount would be orders of magnitudes larger than balance 
https://github.com/code-423n4/2023-01-astaria/blob/1bfc58b42109b839528ab1c21dc9803d663df898/src/WithdrawProxy.sol#L277
then, here we would have underflow of balance value
https://github.com/code-423n4/2023-01-astaria/blob/1bfc58b42109b839528ab1c21dc9803d663df898/src/WithdrawProxy.sol#L281
and finally, here function would revert.
https://github.com/code-423n4/2023-01-astaria/blob/1bfc58b42109b839528ab1c21dc9803d663df898/src/WithdrawProxy.sol#L156
https://github.com/code-423n4/2023-01-astaria/blob/1bfc58b42109b839528ab1c21dc9803d663df898/src/PublicVault.sol#L299
because PublicVault.sol need claim to proccess epoch, and WithdrawProxy.sol unlocks funds only after claim, it will result in deadlock of the whole system.
First, creating token with 8 decimals:
Second, I changed _bid function in TestHelpers.t.sol contract, so it could take token address as a last parameter, and use it instead of WETH.
Then, here is modified testLiquidation5050Split test:
withdrawProxy.claim(); at the last line would revert
https://github.com/code-423n4/2023-01-astaria/blob/1bfc58b42109b839528ab1c21dc9803d663df898/src/WithdrawProxy.sol#L273
Change this line to 10**18
I think this is high risk, because
SantiagoGregory (Astaria) confirmed via duplicate issue #482
