Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The Rust crate wasmtime is affected in versions 42.0.0 up to 48.0.6 and 49.0.0 up to 49.0.3. The source gives few details: it describes the issue only as a failure to properly enforce the async-entrypoint requirement, and does not say what an attacker must do or what impact follows. Upgrade wasmtime to 48.0.6 or 49.0.3, depending on the release line in use.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.9 | Medium | 4.0 | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | CNA (VulnCheck) |
- CISA KEV Not listed.
- EPSS 0.0021, the 11th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 29 Oct 2026, 15:58 UTC Confirmed by the CVE List
- 29 Oct 2026, 16:18 UTC Confirmed by NVD
- 31 Oct 2026, 14:24 UTC First seen by agentprime
- 31 Oct 2026, 14:24 UTC Confirmed by OSV