CVE-2026-119138
Published:October 29, 2026
Updated:November 01, 2026
Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows pending calls to trigger an assertion failure after a trap poisons the Store. Attackers supplying misbehaving guest code can cause a trap and let earlier calls proceed, crashing embedders that continue using the inconsistent Store.
Affected Packages
https://github.com/bytecodealliance/wasmtime.git (GITHUB):
Affected version(s) >=v49.0.0-rc.1 <v49.0.3Fix Suggestion:
Update to version v49.0.3https://github.com/bytecodealliance/wasmtime.git (GITHUB):
Affected version(s) =v50.0.0-rc.1 <v50.0.0Fix Suggestion:
Update to version v50.0.0https://github.com/bytecodealliance/wasmtime.git (GITHUB):
Affected version(s) >=v46.0.0 <v48.0.6 || >=v47.0.0 <v48.0.6 || >=v48.0.0 <v48.0.6Fix Suggestion:
Update to version v48.0.6wasmtime (RUST):
Affected version(s) >=49.0.0-rc.1 <49.0.3Fix Suggestion:
Update to version 49.0.3wasmtime (RUST):
Affected version(s) >=46.0.0 <48.0.6 || >=47.0.0 <48.0.6 || >=48.0.0 <48.0.6Fix Suggestion:
Update to version 48.0.6wasmtime (RUST):
Affected version(s) =50.0.0-rc.1 <50.0.0Fix Suggestion:
Update to version 50.0.0Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Reachable Assertion
EPSS
Base Score:
0.25