Technology · crates.io
wasmtime (crates.io) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 11 vulnerabilities in wasmtime (crates.io): 0 in the last 7 days and 2 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2025-61670, was published on 14 July 2026.
- Last 7 days
- 0
- Last 90 days
- 2
- Critical, all time
- 1
- Exploited in the wild
- 0
About wasmtime (crates.io)
A standalone JIT-style runtime for WebAssembly that implements the WASI standard.
Latest wasmtime (crates.io) vulnerabilities
- CVE-2025-61670: Bytecode Alliance Wasmtime memory leak in C API anyref and externref typeslowCVSS 3.3EPSS 0.2%
- CVE-2026-58494: Bytecode Alliance Wasmtime improper permission preservation in wasmtime-wasimediumCVSS 6.5
- CVE-2026-44216: Bytecode Alliance Wasmtime denial of service via table allocation panichighCVSS 7.5EPSS 0.0%
- CVE-2026-35186: Bytecode Alliance Wasmtime out-of-bounds access in Winch compilermediumCVSS 6.1
- CVE-2026-34987: Bytecode Alliance Wasmtime sandbox escape in Winch compiler backendcriticalCVSS 9.2
- CVE-2026-35195: Bytecode Alliance Wasmtime out-of-bounds write in string transcodingmediumCVSS 6.1
- CVE-2026-34988: Bytecode Alliance Wasmtime data leakage in pooling allocatorlowCVSS 2.3
- CVE-2026-34983: Bytecode Alliance Wasmtime use-after-free in Linker cloninglowCVSS 3.1EPSS 0.1%
- CVE-2026-34971: Bytecode Alliance Wasmtime sandbox escape in Cranelift backend on aarch64highCVSS 7.8EPSS 0.3%
- CVE-2024-47813: Bytecode Alliance Wasmtime race condition in internal type registrylowCVSS 3.1EPSS 0.1%
- CVE-2024-47763: Bytecode Alliance Wasmtime denial of service via tail callsmediumCVSS 5.5EPSS 0.3%
Most severe wasmtime (crates.io) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-34987: Bytecode Alliance Wasmtime sandbox escape in Winch compiler backendcriticalCVSS 9.2
- CVE-2026-34971: Bytecode Alliance Wasmtime sandbox escape in Cranelift backend on aarch64highCVSS 7.8EPSS 0.3%
- CVE-2026-44216: Bytecode Alliance Wasmtime denial of service via table allocation panichighCVSS 7.5EPSS 0.0%
- CVE-2026-58494: Bytecode Alliance Wasmtime improper permission preservation in wasmtime-wasimediumCVSS 6.5
- CVE-2026-35186: Bytecode Alliance Wasmtime out-of-bounds access in Winch compilermediumCVSS 6.1
- CVE-2026-35195: Bytecode Alliance Wasmtime out-of-bounds write in string transcodingmediumCVSS 6.1
- CVE-2024-47763: Bytecode Alliance Wasmtime denial of service via tail callsmediumCVSS 5.5EPSS 0.3%
- CVE-2025-61670: Bytecode Alliance Wasmtime memory leak in C API anyref and externref typeslowCVSS 3.3EPSS 0.2%
- CVE-2024-47813: Bytecode Alliance Wasmtime race condition in internal type registrylowCVSS 3.1EPSS 0.1%
- CVE-2026-34983: Bytecode Alliance Wasmtime use-after-free in Linker cloninglowCVSS 3.1EPSS 0.1%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 1 | 0 | |
| 13 Jul 2026 | 1 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/wasmtime.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "wasmtime (crates.io) vulnerabilities", https://junglewise.ai/threats/technologies/wasmtime, 26 September 2026.