Technology · crates.io
wasmtime-wasi (crates.io) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 11 vulnerabilities in wasmtime-wasi (crates.io): 0 in the last 7 days and 7 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, RUSTSEC-2026-0420 - wasip3 UDP `send` can deliver a datagram to an address…, was published on 29 October 2026. 2 vulnerabilities in the last four weeks, down 60% on the four before (5).
- Last 7 days
- 0
- Last 90 days
- 7
- Critical, all time
- 0
- Exploited in the wild
- 0
About wasmtime-wasi (crates.io)
A Rust implementation of the WebAssembly System Interface (WASI) for the Wasmtime runtime.
Latest wasmtime-wasi (crates.io) vulnerabilities
- RUSTSEC-2026-0420 - wasip3 UDP `send` can deliver a datagram to an address only allowed for receivinglowCVSS 3.1
- Wasmtime-WASI filesystem sandbox escape with symlink renamemediumCVSS 4
- RUSTSEC-2026-0324 - Guest can panic host through filesystem timestamp before the epoch on wasip3lowCVSS 3.1
- wasmtime-wasi excessive memory allocation when guests lack stdiomediumCVSS 4
- Wasmtime wasmtime-wasi fd_readdir information disclosuremediumCVSS 4
- RUSTSEC-2026-0321 - WASI preview 0 implementation of `poll_oneoff` circumvents fuel consumptionlowCVSS 3.1
- RUSTSEC-2026-0314 - Guest can panic host through filesystem datetime overflowlowCVSS 3.1
- CVE-2026-58494: Bytecode Alliance Wasmtime improper permission preservation in wasmtime-wasimediumCVSS 6.5EPSS 0.2%
- CVE-2026-54786: Bytecode Alliance Wasmtime resource leak in WASIp1 fd_renumbermediumCVSS 5EPSS 0.4%
- CVE-2026-47261: Bytecode Alliance Wasmtime access control bypass in wasmtime-wasihighCVSS 7.5EPSS 0.5%
- CVE-2025-53901: RUSTSEC-2025-0046 - Host panic with `fd_renumber` WASIp1 functionlowCVSS 3.1EPSS 0.3%
Most severe wasmtime-wasi (crates.io) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-47261: Bytecode Alliance Wasmtime access control bypass in wasmtime-wasihighCVSS 7.5EPSS 0.5%
- CVE-2026-58494: Bytecode Alliance Wasmtime improper permission preservation in wasmtime-wasimediumCVSS 6.5EPSS 0.2%
- CVE-2026-54786: Bytecode Alliance Wasmtime resource leak in WASIp1 fd_renumbermediumCVSS 5EPSS 0.4%
- Wasmtime-WASI filesystem sandbox escape with symlink renamemediumCVSS 4
- wasmtime-wasi excessive memory allocation when guests lack stdiomediumCVSS 4
- Wasmtime wasmtime-wasi fd_readdir information disclosuremediumCVSS 4
- CVE-2025-53901: RUSTSEC-2025-0046 - Host panic with `fd_renumber` WASIp1 functionlowCVSS 3.1EPSS 0.3%
- RUSTSEC-2026-0420 - wasip3 UDP `send` can deliver a datagram to an address only allowed for receivinglowCVSS 3.1
- RUSTSEC-2026-0321 - WASI preview 0 implementation of `poll_oneoff` circumvents fuel consumptionlowCVSS 3.1
- RUSTSEC-2026-0324 - Guest can panic host through filesystem timestamp before the epoch on wasip3lowCVSS 3.1
Vulnerabilities per week
2 vulnerabilities in the last four weeks, down 60% on the four before (5). The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 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 | 1 | 0 | |
| 28 Sep 2026 | 4 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 1 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 1 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
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A live badge for a README, a status page or an internal wiki: how many wasmtime-wasi (crates.io) vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/wasmtime-wasi)<a href="https://junglewise.ai/threats/technologies/wasmtime-wasi"><img src="https://junglewise.ai/threats/technologies/wasmtime-wasi/badge.svg" alt="wasmtime-wasi (crates.io) vulnerabilities" /></a>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-wasi.json, and this page as text at https://junglewise.ai/threats/technologies/wasmtime-wasi.md, 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-wasi (crates.io) vulnerabilities", https://junglewise.ai/threats/technologies/wasmtime-wasi, 9 November 2026.