EUVD-2026-106920

Vyper 0.3.8 through 0.5.0b1 contains an optimizer miscompilation in which msg.value | K or lenmsg.data | K, where K is any nonzero integer literal, is compiled to the constant 1 when used as a ternary expression branch under -O gas the default or -O codesize. Affected contracts use the wrong valu...