Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 Cross-Engine Type Confusion (bytecodealliance wasmtime)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.09 % · percentile 0 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- VulnCheck
- NVD status
- Deferred
Description
Wasmtime before 24.0.12, 25.0.0 before 36.0.13, 37.0.0 before 46.0.2, and 47.0.0 before 47.0.3 contains a type confusion vulnerability because several Store APIs fail to validate that objects belong to the Store's Engine. Embedders mixing objects between Engines via Instance::new, StructRefPre::new, or Tag::new can trigger trampoline signature mismatches causing out-of-bounds stack writes, GC heap corruption, or panics.
Weaknesses (CWE)
- CWE-787 — Out-of-bounds Write
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | LOW 1.0 | CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| CVSS 3.1 | LOW 3.8 | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L | VulnCheck |
| CVSS 4.0 | LOW 1.0 | CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · disclosure@vulncheck.com (Secondary) |
| CVSS 3.1 | LOW 3.8 | CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L | NVD · disclosure@vulncheck.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-108327
- GCVE · GCVE-0-2026-115393
Affected products
| Product | Versions |
|---|---|
| bytecodealliance · wasmtime | affected 0 < 24.0.12 ; unaffected 24.0.12 ; affected 25.0.0 < 36.0.13 ; unaffected 36.0.13 ; affected 37.0.0 < 46.0.2 ; unaffected 46.0.2 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |