Technology · crates.io
wasmtime-wasi-http (crates.io) vulnerabilities
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Junglewise Threat Intelligence has tracked 8 vulnerabilities in wasmtime-wasi-http (crates.io): 0 in the last 7 days and 8 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, RUSTSEC-2026-0421 - wasi-http p2: outgoing content-length can be invalid or…, was published on 29 October 2026. 6 vulnerabilities in the last four weeks, up 200% on the four before (2).
- Last 7 days
- 0
- Last 90 days
- 8
- Critical, all time
- 0
- Exploited in the wild
- 0
About wasmtime-wasi-http (crates.io)
WebAssembly runtime module implementing WASI HTTP interface for making HTTP requests from WASM programs.
Latest wasmtime-wasi-http (crates.io) vulnerabilities
- RUSTSEC-2026-0421 - wasi-http p2: outgoing content-length can be invalid or not match bodylowCVSS 3.1
- RUSTSEC-2026-0375 - `wasi-http` p3: Guests can set incorrect content-length for spliced response bodieslowCVSS 3.1
- RUSTSEC-2026-0377 - `wasi-http` p3: forwarded trailers aren't checked against `is_forbidden_header` hooklowCVSS 3.1
- RUSTSEC-2026-0376 - `wasi-http`: Guests can add conflicting content lengths to messageslowCVSS 3.1
- RUSTSEC-2026-0351 - `wasi-http`: Request with long url before query parameter crashes hostlowCVSS 3.1
- Wasmtime WASI HTTP absolute-form request redirectmediumCVSS 4
- Wasmtime wasi:http implementation panic with zero timeoutmediumCVSS 4
- RUSTSEC-2026-0313 - Outgoing HTTP body write allows guest-driven host memory exhaustionlowCVSS 3.1
Most severe wasmtime-wasi-http (crates.io) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- Wasmtime WASI HTTP absolute-form request redirectmediumCVSS 4
- Wasmtime wasi:http implementation panic with zero timeoutmediumCVSS 4
- RUSTSEC-2026-0421 - wasi-http p2: outgoing content-length can be invalid or not match bodylowCVSS 3.1
- RUSTSEC-2026-0377 - `wasi-http` p3: forwarded trailers aren't checked against `is_forbidden_header` hooklowCVSS 3.1
- RUSTSEC-2026-0376 - `wasi-http`: Guests can add conflicting content lengths to messageslowCVSS 3.1
- RUSTSEC-2026-0375 - `wasi-http` p3: Guests can set incorrect content-length for spliced response bodieslowCVSS 3.1
- RUSTSEC-2026-0351 - `wasi-http`: Request with long url before query parameter crashes hostlowCVSS 3.1
- RUSTSEC-2026-0313 - Outgoing HTTP body write allows guest-driven host memory exhaustionlowCVSS 3.1
Vulnerabilities per week
6 vulnerabilities in the last four weeks, up 200% on the four before (2). 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 | 1 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 2 | 0 | |
| 19 Oct 2026 | 3 | 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-http (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-http)<a href="https://junglewise.ai/threats/technologies/wasmtime-wasi-http"><img src="https://junglewise.ai/threats/technologies/wasmtime-wasi-http/badge.svg" alt="wasmtime-wasi-http (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-http.json, and this page as text at https://junglewise.ai/threats/technologies/wasmtime-wasi-http.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-http (crates.io) vulnerabilities", https://junglewise.ai/threats/technologies/wasmtime-wasi-http, 9 November 2026.