CVE-2021-48018

Vyper from 0.2.13 before 0.2.15 allocates storage slots for @nonreentrant reentrancy locks at the same locations as contract storage variables. When a function using @nonreentrant is called, setting the lock overwrites the overlapping storage variable, corrupting contract state and breaking the...

CVE-2026-114118 Vyper 0.3.4 through 0.5.0b1 create_from_blueprint Offset Validation Bypass via Unsigned Wraparound

Vyper 0.3.4 through 0.5.0b1 computes the remaining blueprint size in createfromblueprint by uint256 subtraction without first checking that codeoffset is below the blueprint's code size, so a huge offset wraps to a small positive value. An attacker controlling codeoffset can make a factory deploy...

CVE-2026-114118

Vyper versions 0.3.4 through 0.5.0b1 are vulnerable to an offset validation bypass in the create_from_blueprint function. The root cause is a uint256 subtraction performed without verifying that the code_offset is within the blueprint's code size, allowing a large offset to wrap around to a small...

CVE-2026-114118

Vyper 0.3.4 through 0.5.0b1 computes the remaining blueprint size in createfromblueprint by uint256 subtraction without first checking that codeoffset is below the blueprint's code size, so a huge offset wraps to a small positive value. An attacker controlling codeoffset can make a factory deploy...

EUVD-2026-106921

Vyper 0.3.4 through 0.5.0b1 computes the remaining blueprint size in createfromblueprint by uint256 subtraction without first checking that codeoffset is below the blueprint's code size, so a huge offset wraps to a small positive value. An attacker controlling codeoffset can make a factory deploy...

CVE-2026-114117 Vyper 0.3.8 through 0.5.0b1 Optimizer Miscompilation of msg.value | K in Ternary Branches

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...

CVE-2026-114117

The Vyper compiler (versions 0.3.8 through 0.5.0b1 ) contains an optimizer miscompilation affecting ternary expression branches. When using the -O gas (default) or -O codesize optimization flags, the expressions (msg.value | K) or (len(msg.data) | K)—where K is any nonzero integer literal—are inc...

CVE-2026-114117 Vyper 0.3.8 through 0.5.0b1 Optimizer Miscompilation of msg.value | K in Ternary Branches

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...

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...

CVE-2026-114117 Vyper 0.3.8 through 0.5.0b1 Optimizer Miscompilation of msg.value | K in Ternary Branches

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...

CVE-2026-114117

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...

CVE-2026-114116

The Vyper compiler versions 0.1.0b1 before 0.1.0b17 and 0.4.1 through 0.5.0b1 are vulnerable to literal value manipulation. The root cause is the use of str.splitlines() to build the source-line table, which incorrectly treats characters like form feed and U+2028 as line breaks while the Python p...

CVE-2026-114115

Vyper 0.3.8 through 0.5.0b1 contains a compiler miscompilation vulnerability in parseIfExp that reads nested arrays with narrower inner bounds using the wider result type's memory layout. When a ternary selects the narrower array, inner arrays after the first are read at wrong offsets, causing...

CVE-2026-114115 Vyper 0.3.8 through 0.5.0b1 Memory Misread via Ternary Nested Array Selection

Vyper 0.3.8 through 0.5.0b1 contains a compiler miscompilation vulnerability in parseIfExp that reads nested arrays with narrower inner bounds using the wider result type's memory layout. When a ternary selects the narrower array, inner arrays after the first are read at wrong offsets, causing...

EUVD-2026-106919

Vyper 0.1.0b1 before 0.1.0b17 and 0.4.1 through 0.5.0b1 builds its source-line table with str.splitlines, which treats characters like form feed and U+2028 as line breaks the Python parser ignores, so numeric literals are classified and validated from shifted source text. An attacker contributing...

CVE-2026-114115 Vyper 0.3.8 through 0.5.0b1 Memory Misread via Ternary Nested Array Selection

Vyper 0.3.8 through 0.5.0b1 contains a compiler miscompilation vulnerability in parseIfExp that reads nested arrays with narrower inner bounds using the wider result type's memory layout. When a ternary selects the narrower array, inner arrays after the first are read at wrong offsets, causing...

CVE-2026-114116 Vyper through 0.5.0b1 Literal Value Manipulation via Line Separators

Vyper 0.1.0b1 before 0.1.0b17 and 0.4.1 through 0.5.0b1 builds its source-line table with str.splitlines, which treats characters like form feed and U+2028 as line breaks the Python parser ignores, so numeric literals are classified and validated from shifted source text. An attacker contributing...

CVE-2026-114115

Vyper versions 0.3.8 through 0.5.0b1 are affected by a compiler miscompilation vulnerability in parse_IfExp. The issue occurs when a ternary operator selects a nested array with narrower inner bounds, but the compiler uses the memory layout of the wider result type. This results in inner arrays a...

CVE-2026-114116

Vyper 0.1.0b1 before 0.1.0b17 and 0.4.1 through 0.5.0b1 builds its source-line table with str.splitlines, which treats characters like form feed and U+2028 as line breaks the Python parser ignores, so numeric literals are classified and validated from shifted source text. An attacker contributing...

EUVD-2026-106918

Vyper 0.3.8 through 0.5.0b1 contains a compiler miscompilation vulnerability in parseIfExp that reads nested arrays with narrower inner bounds using the wider result type's memory layout. When a ternary selects the narrower array, inner arrays after the first are read at wrong offsets, causing...