PT-2025-7605 · Vyper · Vyper

Name of the Vulnerable Software and Affected Versions: Vyper versions prior to 0.4.1 Description: The issue arises from the improper handling of oscillating final states in the sqrt function, which uses the babylonian method to calculate square roots of decimals. This can lead to sqrt incorrectly...

CVE-2022-29255

Vyper is a Pythonic Smart Contract Language for the ethereum virtual machine. In versions prior to 0.3.4 when a calling an external contract with no return value, the contract address including side effects could be evaluated twice. This may result in incorrect outcomes for contracts. This issue...

CVE-2022-24788

Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. Versions of vyper prior to 0.3.2 suffer from a potential buffer overrun. Importing a function from a JSON interface which returns bytes generates bytecode which does not clamp bytes length, potentially resulting in a...

CVE-2022-24845

Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. In affected versions, the return of .returnsint128 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,...

CVE-2022-24787

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. In version 0.3.1 and prior, bytestrings can have dirty bytes in them, resulting in the word-for-word comparisons giving incorrect results. Even without dirty nonzero bytes, two bytestrings can compare to equal if one en...

CVE-2024-43366

zkvyper is a Vyper compiler. Starting in version 1.3.12 and prior to version 1.5.3, since LLL IR has no Turing-incompletness restrictions, it is compiled to a loop with a much more late exit condition. It leads to a loss of funds or other unwanted behavior if the loop body contains it. However,...

CVE-2024-24561

Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. In versions 0.3.10 and earlier, the bounds check for slices does not account for the ability for start + length to overflow when the values aren't literals. If a slice function uses a non-literal argument for the start ...

CVE-2024-24563

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. Arrays can be keyed by a signed integer, while they are defined for unsigned integers only. The typechecker doesn't throw when spotting the usage of an int as an index for an array. The typechecker allows the usage of...

CVE-2024-22419

Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine. The concat built-in can write over the bounds of the memory buffer that was allocated for it and thus overwrite existing valid data. The root cause is that the buildIR for concat doesn't properly adhere to the API of co...

Gas Manipulation Attack

vyper is vulnerable to Gas Manipulation Attack. The vulnerability is due to insufficient error handling in the Vyper Compiler, which fails to check the success flag of precompile calls EcRecover and Identity, allowing attackers to manipulate the gas, causing precompile failures without halting...

PYSEC-2025-33

Vyper is a Pythonic Smart Contract Language for the EVM. When the Vyper Compiler uses the precompiles EcRecover 0x1 and Identity 0x4, the success flag of the call is not checked. As a consequence an attacker can provide a specific amount of gas to make these calls fail but let the overall executi...

CVE-2025-21607

Vyper is a Pythonic Smart Contract Language for the EVM. When the Vyper Compiler uses the precompiles EcRecover 0x1 and Identity 0x4, the success flag of the call is not checked. As a consequence an attacker can provide a specific amount of gas to make these calls fail but let the overall executi...

PYSEC-2025-33

Vyper is a Pythonic Smart Contract Language for the EVM. When the Vyper Compiler uses the precompiles EcRecover 0x1 and Identity 0x4, the success flag of the call is not checked. As a consequence an attacker can provide a specific amount of gas to make these calls fail but let the overall executi...

Improper Check or Handling of Exceptional Conditions

Overview vyper is a Pythonic Smart Contract Language for the EVM. Affected versions of this package are vulnerable to Improper Check or Handling of Exceptional Conditions due to a failure to verify the success flag of calls to the precompiles EcRecover 0x1 and Identity 0x4. An attacker can exploi...

CVE-2025-21607

The CVE-2025-21607 issue affects the Vyper Pythonic smart contract language compiler when using precompiles EcRecover (0x1) and Identity (0x4); the success flag of those calls isn’t checked, allowing an attacker to allocate gas to cause a precompile to fail while the rest of execution continues, ...

CVE-2025-21607 Success of Certain Precompile Calls not Checked in Vyper

Vyper is a Pythonic Smart Contract Language for the EVM. When the Vyper Compiler uses the precompiles EcRecover 0x1 and Identity 0x4, the success flag of the call is not checked. As a consequence an attacker can provide a specific amount of gas to make these calls fail but let the overall executi...

CVE-2025-21607 Success of Certain Precompile Calls not Checked in Vyper

Vyper is a Pythonic Smart Contract Language for the EVM. When the Vyper Compiler uses the precompiles EcRecover 0x1 and Identity 0x4, the success flag of the call is not checked. As a consequence an attacker can provide a specific amount of gas to make these calls fail but let the overall executi...

CVE-2025-21607 Success of Certain Precompile Calls not Checked in Vyper

Vyper is a Pythonic Smart Contract Language for the EVM. When the Vyper Compiler uses the precompiles EcRecover 0x1 and Identity 0x4, the success flag of the call is not checked. As a consequence an attacker can provide a specific amount of gas to make these calls fail but let the overall executi...

GHSA-VGF2-GVX8-XWC3 Vyper Does Not Check the Success of Certain Precompile Calls

Summary When the Vyper Compiler uses the precompiles EcRecover 0x1 and Identity 0x4, the success flag of the call is not checked. As a consequence an attacker can provide a specific amount of gas to make these calls fail but let the overall execution continue. Then the execution result can be...

Vyper Does Not Check the Success of Certain Precompile Calls

Summary When the Vyper Compiler uses the precompiles EcRecover 0x1 and Identity 0x4, the success flag of the call is not checked. As a consequence an attacker can provide a specific amount of gas to make these calls fail but let the overall execution continue. Then the execution result can be...