CVE-2026-119137
Published:October 29, 2026
Updated:October 31, 2026
Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a stack overflow vulnerability that allows guests to crash the host through recursive type drops. Guests can define a long chain of recursive types so that removing the top-level type triggers unbounded recursive drops, exhausting the host stack.
Affected Packages
https://github.com/bytecodealliance/wasmtime.git (GITHUB):
Affected version(s) >=v42.0.0 <v48.0.6 || >=v43.0.0 <v48.0.6 || >=v44.0.0 <v48.0.6 || >=v45.0.0 <v48.0.6 || >=v46.0.0 <v48.0.6 || >=v47.0.0 <v48.0.6 || >=v48.0.0 <v48.0.6Fix Suggestion:
Update to version v48.0.6https://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 v50.0.0wasmtime (RUST):
Affected version(s) >=42.0.0 <48.0.6 || >=43.0.0 <48.0.6 || >=44.0.0 <48.0.6 || >=45.0.0 <48.0.6 || >=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 50.0.0wasmtime (RUST):
Affected version(s) >=49.0.0-rc.1 <49.0.3Fix Suggestion:
Update to version 49.0.3Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Uncontrolled Recursion
EPSS
Base Score:
0.40