SUSE CVE-2026-34942

Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime's implementation of transcoding strings into the Component Model's utf16 or latin1+utf16 encodings improperly verified the alignment of reallocated strings. This meant that unaligned pointers could be...

EUVD-2026-21024

Wasmtime has host data leakage with 64-bit tables and Winch...

CVE-2026-34945

Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Winch compiler contains a bug where a 64-bit table, part of the memory64 proposal of WebAssembly, incorrectly translated the table.size instruction. This bug could lead to disclosing data on the...

PT-2026-31691

Name of the Vulnerable Software and Affected Versions Wasmtime versions 28.0.0 through 36.0.6, 42.0.2 and 43.0.1 Description Wasmtime's pooling allocator implementation contains a flaw where linear memory contents can leak between WebAssembly instances under specific configurations. This occurs d...