CVE-2026-34983
3 advisories.
crates.io/wasmtime CVE-2026-34983: low
Wasmtime has use-after-free bug after cloning `wasmtime::Linker`
Action: Upgrade wasmtime to 43.0.1 or later.
cargo update -p wasmtime --precise 43.0.1Affected
| introduced | fixed | last affected |
|---|---|---|
| 43.0.0 | 43.0.1 | - |
Fixed versions
| 43.0.1 |
Sources
- osv: GHSA-hfr4-7c6c-48w2
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hfr4-7c6c-48w2
- https://nvd.nist.gov/vuln/detail/CVE-2026-34983
- https://github.com/bytecodealliance/wasmtime
- https://github.com/pypa/advisory-database/tree/main/vulns/wasmtime/PYSEC-2026-151.yaml
- https://rustsec.org/advisories/RUSTSEC-2026-0090.html
CVE-2026-34983 · published · modified · JSON
crates.io/wasmtime CVE-2026-34983: unknown
Use-after-free bug after cloning `wasmtime::Linker`
Action: Upgrade wasmtime to 43.0.1 or later.
cargo update -p wasmtime --precise 43.0.1Affected
| introduced | fixed | last affected |
|---|---|---|
| 43.0.0 | 43.0.1 | - |
Fixed versions
| 43.0.1 |
Sources
- osv: RUSTSEC-2026-0090
- https://crates.io/crates/wasmtime
- https://rustsec.org/advisories/RUSTSEC-2026-0090.html
- https://github.com/bytecodealliance/wasmtime/issues/12069
CVE-2026-34983 · published · modified · JSON
PyPI/wasmtime CVE-2026-34983: medium 5
Wasmtime is a runtime for WebAssembly. In 43.0.0, cloning a wasmtime::Linker is unsound and can result in use-after-free bugs. This bug is not controllable by guest Wasm programs. It can only be trigg
Action: No fix published. Pin and monitor.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | - | 43.0.0 |
Fixed versions
No fixed version in the source.
Sources
- osv: PYSEC-2026-151
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hfr4-7c6c-48w2
CVE-2026-34983 · published · modified · JSON