Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Wasmtime versions 10.0.0 up to 24.0.4, 25.0.0 up to 33.0.2, and 34.0.0 up to 34.0.2 are affected by a host panic in the WASIp1 fd_renumber function. The source gives few details beyond this, so the exact trigger and conditions are not described. Upgrade to Wasmtime 24.0.4, 33.0.2, or 34.0.2, 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 |
|---|---|---|---|---|
| 3.5 | Low | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0038, the 32nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:24 UTC First seen by agentprime
- 31 Oct 2026, 14:24 UTC Confirmed by OSV