CVE-2026-119133: Wasmtime 47.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Misaligned VMContext via Exception Tags
bytecodealliance · wasmtime
Vendor fix available · Affected: bytecodealliance wasmtime · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 11% of scored CVEs
DescriptionCVE.org
Wasmtime 47.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a memory misalignment flaw in VMContext layout that causes undefined behavior when modules contain an odd number of exception tags. A WebAssembly module with an odd tag count misaligns subsequent host fields in embedders with exceptions enabled, although no exploitation path is currently known.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- bytecodealliance · wasmtimefrom 47.0.0 before 48.0.6; from 49.0.0 before 49.0.3
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Weakness
- Reliance on Undefined, Unspecified, or Implementation-Defined Behavior · Input Validation and Logic
- Vendor
- bytecodealliance
- Published
- October 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-119133 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.