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EUVD-2026-232763

2026-10-17T08:43:32.400062+00:00

EUVD-2026-232763

fkie_cve-2022-24845

2026-10-17T08:43:32.400097+00:00

Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. In affected versions, the return of `.returns_int128()` is not validated to fall within the bounds of `int128`. This issue can result in a misinterpretation of the integer value and lead to incorrect behavior. As of v0.3.0, `.returns_int128()` is validated in simple expressions, but not complex expressions. Users are advised to upgrade. There is no known workaround for this issue.

GHSA-j2x6-9323-fp7h — Integer bounds error in Vyper

2026-10-17T08:43:32.400130+00:00

Affected: PyPI: vyper

### Impact in the following code, the return of `.returns_int128()` is not validated to fall within the bounds of `int128`. as of v0.3.0, `.returns_int128()` is validated in simple expressions, but not complex expressions. ```vyper interface iface: def returns_int128() -> int128: view def returns_Bytes33() -> Bytes[33]: view

x: iface @external def call_out(): x: int128 = self.x.returns_int128() # affected, <0.3.0 y: uint256 = convert(self.x.returns_int128(), uint256) # affected, <0.3.2 z: Bytes[33] = concat(self.x.returns_Bytes33(), b"") # affected >= 0.3.0, <0.3.2 ```

### Patches 0.3.2 (as of https://github.com/vyperlang/vyper/commit/049dbdc647b2ce838fae7c188e6bb09cf16e470b)

### Workarounds Break up operations involving external calls into multiple statements. For instance, instead of the example above, use ``` x: int128 = self.x.returns_int128() y: uint256 = convert(x, uint256) ```

gsd-2022-24845

2026-10-17T08:43:32.400164+00:00

gsd-2022-24845

PYSEC-2022-198

2026-10-17T08:43:32.400178+00:00

Affected: PyPI: vyper