Name: Wasmtime
Author: Bytecode Alliance

Wasmtime

Bytecode Alliance · BytecodeAlliance.Wasmtime.Portable

A fast and secure runtime for WebAssembly

Wasmtime is a Bytecode Alliance project that is a standalone wasm-only optimizing runtime for WebAssembly and WASI. It runs WebAssembly code outside of the Web, and can be used both as a command-line utility or as a library embedded in a larger application.

winget install --id BytecodeAlliance.Wasmtime.Portable --exact --source winget

Latest 43.0.1

Release Notes

43.0.1 Released 2026-04-09. Fixed

Miscompiled guest heap access enables sandbox escape on aarch64 Cranelift. GHSA-jhxm-h53p-jm7w
Wasmtime with Winch compiler backend may allow a sandbox-escaping memory access. GHSA-xx5w-cvp6-jv83
Out-of-bounds write or crash when transcoding component model strings. GHSA-394w-hwhg-8vgm
Host panic when Winch compiler executes table.fill. GHSA-q49f-xg75-m9xw
Wasmtime segfault or unused out-of-sandbox load with f64x2.splat operator on x86-64. GHSA-qqfj-4vcm-26hv
Improperly masked return value from table.grow with Winch compiler backend. GHSA-f984-pcp8-v2p7
Panic when transcoding misaligned utf-16 strings. GHSA-jxhv-7h78-9775
Panic when lifting flags component value. GHSA-m758-wjhj-p3jq
Heap OOB read in component model UTF-16 to latin1+utf16 string transcoding. GHSA-hx6p-xpx3-jvvv
Use-after-free bug after cloning wasmtime::Linker. GHSA-hfr4-7c6c-48w2
Data leakage between pooling allocator instances. GHSA-6wgr-89rj-399p
Host data leakage with 64-bit tables and Winch. GHSA-m9w2-8782-2946

Installer type: `zip`

Architecture	Scope	Download	SHA256
`x64`	—	Download	`CB627546A9F0F2F24F3D68FCE34B40F13D6B1ABE4B70F3AFDE0038AD9FE4E6EA`

Details

Homepage: https://wasmtime.dev/
License: Apache-2.0
Publisher: Bytecode Alliance
Support: https://github.com/bytecodealliance/wasmtime/issues
Copyright: Copyright © 2019-2023 the Bytecode Alliance contributors.

Older versions (48)

43.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`3D8B9DCFADBD7317A65B981D8A197F5DFD2373CBD5C7F6C86BD5287CE90C719B`

42.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`DAA52754776EABDBBF82037D41A26F556CCD4FD5723DCAB328B12C680894C072`

42.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`A7A005FBF48A7BD202E1F501454C7A79CC5A97597AC23D476448AC0741DFDF6F`

41.0.3

Architecture	Scope	Download	SHA256
`x64`	—	Download	`F6EF3A3CCC74100C9DADC8A31CBD401CA2B0A195AA0599388786D61462E56AFE`

41.0.2

Architecture	Scope	Download	SHA256
`x64`	—	Download	`625B11F39ABE61C7FC630CAF33F9801EB3C2853464DD29A2A1E374D875C955A1`

41.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`B15AAB059CAEFCA3AFE69DCAAC9ABD21BBA90D73E2939CD9C074050CE0539F1A`

41.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`78F4216DFFDCE4A8B2310BFF6E019C1EA9D2935D72E4CCDB7CD7BCBC5907FD0A`

40.0.2

Architecture	Scope	Download	SHA256
`x64`	—	Download	`D221CD2985E0E1A72C4FB86F349CF0DFF935BBE6D7AD73CD77C55A58FA293AEA`

40.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`434451FC2ABAEACC3DC312A92BD73DA54EF8A29644F386070A86C0F43E3B4AD6`

40.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`9E4190C52C7693E6C0D5DC306B4DC095292F3C9456B7A26DBE52833A443BD505`

39.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`BCCF64B4227D178C0D13F2856BE68876EAE3F2F657F3A85D46F076A5E1976198`

39.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`07C4CECE77A8F315E4EDB7E0FEF3F78A6882C3D3DBB2ADCCAAD4843DC70F1C6D`

38.0.4

Architecture	Scope	Download	SHA256
`x64`	—	Download	`5A30C7A78F48A1CAA2AFB1DD541493FD8AF5F629EA45097B04F2412E651285B6`

38.0.2

Architecture	Scope	Download	SHA256
`x64`	—	Download	`96128023D3F807A2AD242D74F96771CAECCDA6BC20E693C61989440398449A39`

38.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`956BAB437DB2BE644EC60D5F251A132834DE5CBB45AE350DE2C4EC179F9638CF`

37.0.2

Architecture	Scope	Download	SHA256
`x64`	—	Download	`9AAA2406C990E773CEF8D90F409982FAC28D3D330AD40A5FAB1233B8C5D88795`

37.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`ABEB64E3DCDC57349519750C6B773123359717C7846186F81D5EED481C63D05E`

37.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`4C38B612F03717A4AB7DD822BF7D66BA3CAE65E756D5D9D437744F1439FCBDBE`

36.0.2

Architecture	Scope	Download	SHA256
`x64`	—	Download	`FB1FA999FF728D5A8E4B4057308561C51AF7F59AFDEAC2D649DDA7D4AD7E77AD`

36.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`02F360F5419A443EB236509E9EE09CEFAEEDD2080CA243FE4EC6AC9B4295CC0F`

36.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`63BF452D018D7E3F7E2FE6F33BA71AFA4EB56ECB930A05528AA3C5C793E44B87`

35.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`CB4D9B788E81268EDFB43D26C37DC4115060635FF4ECEED16F4F9E6F331179B1`

34.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`5AC620948DCE08D61F66DC49196706244AE53486988FB06A09A43060F2BDEC90`

33.0.2

Architecture	Scope	Download	SHA256
`x64`	—	Download	`AB1C59BBFB9CA5A5144EE5D16BAFF42D8CC5F68CA60665FFBBA393EB0FCF705C`

33.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`2833FC01A3F9165162E0699DC37EAEE67415D644B20A244983365D7DB97B8E02`

32.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`3C277307EAD4876381CF3F5DA52463786D78C1EB0AA4C6C155FC1AEDB29C9424`

32.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`9E3A4A8AFC8B15B2A897F00A89C6F9A83541A2B55D38692CBCDD9F49CD127613`

31.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`CFC5A7B1FDE73D808791DD266E9F36731DD68583BEC5B2380C7CD9BC515B2470`

29.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`3D4C7B4145FB4426C4ECE54302F598C33998F9D2CC8894059D7103B83D3DDDFF`

17.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`B8B3DDB454094BF24EA83EA7F9D2C1CCA35D4519C35A02085F4B73FC0F67B84F`

17.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`BC0B837E258E2E7283DA90EDB9FFEAA7C3716D5B33C9A8C53D9BAA957A687C8C`

16.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`C6A4A247FBE50BA306DCAF91327E3F4ECEAC007554739648CF09542F87C12EFB`

15.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`FBD32138BFDFBA5CAC2067DACD4C3A5D4BCAC1137E138177E684F6CD8A5ED6B8`

15.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`70EE6BF44AFD29CDD6B480675070E899489162906D83449A7D4A2C82CC2371C3`

14.0.4

Architecture	Scope	Download	SHA256
`x64`	—	Download	`D92867844663287F9A74E74F5006212F81F3AF80E80EC000245B34A7A9375FE8`

14.0.3

Architecture	Scope	Download	SHA256
`x64`	—	Download	`6AE803BD0E66F2FC22B4165B0282757571A101AF60FBAC789A6E7F2074AC72A9`

14.0.2

Architecture	Scope	Download	SHA256
`x64`	—	Download	`8EDF2A37FCB4504A59BCCF63FD9E4110D28A5EBB6CF9363267BD584094E81AAB`

14.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`81F80F914D67D30A403D0593E9AD65C661E47CCA65D7013AD07FD977B7409956`

13.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`AD1DEA7C069EEDA2432D4344221B05C46D146AAA7F5B16CBD468932E9FDAAC76`

12.0.2

Architecture	Scope	Download	SHA256
`x64`	—	Download	`9843D87D6BDE399D7CCB3BA8699486F5A5EA145B106FA3BD4CA6E13AB2C61119`

12.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`1878426629E78C7D80D26448FE5C9D8ADF878383EDC6EA4C772BC7EF59F963FB`

12.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`FB0C6E981F2D1997174EF198819091BDCA517C20ECD727762E0B38D2643B1B4D`

11.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`0048FBC227BD600AA21EFF6B32D12092BF96D72C99483FE229E9DB698DFA1F6C`

11.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`E7D17A0613FBBE0194E2340899D347FFF2CEACC466DECFBB7CFBA0A4715DF950`

10.0.1

Architecture	Scope	Download	SHA256
`x64`	—	Download	`05452D493A620C1CEF3612C007C6050BE77598265D72EA50081294712808C949`

10.0.0

Architecture	Scope	Download	SHA256
`x64`	—	Download	`C08CB3E8CDFB1E01CA01F3B6A80B48D9E50D3A344DAEAAC333748F23279CFAC6`

9.0.4

Architecture	Scope	Download	SHA256
`x64`	—	Download	`809ACA3FA66D3322DD9ECA1E0E423EFA3BB13B9FEB7A3D3FFD4A79FBDCD74D61`

9.0.3

Architecture	Scope	Download	SHA256
`x64`	—	Download	`AC2C610F83D994B09A85F3467CE2252DA69C9DB37A638D1B4C372A1F3D9BE160`

Wasmtime

Latest 43.0.1

Installer type: zip

Details

Tags

Older versions (48)

Installer type: `zip`