CVE-2026-115390
Published:October 22, 2026
Updated:October 23, 2026
Wasmtime 47.0.0 before 48.0.3 and 49.0.0 before 49.0.1 contains a fuel accounting flaw in Cranelift-compiled call_ref and try_table catch paths. Malicious guests can reset consumed fuel after calls to run exponentially long on linear fuel, evading timeouts and periodic yields for denial of service.
Affected Packages
https://github.com/bytecodealliance/wasmtime.git (GITHUB):
Affected version(s) =v49.0.0 <v49.0.1Fix Suggestion:
Update to version v49.0.1https://github.com/bytecodealliance/wasmtime.git (GITHUB):
Affected version(s) >=v48.0.0 <v48.0.3Fix Suggestion:
Update to version v48.0.3wasmtime (RUST):
Affected version(s) >=48.0.0 <48.0.3Fix Suggestion:
Update to version 48.0.3wasmtime-internal-cranelift (RUST):
Affected version(s) >=48.0.0 <48.0.3Fix Suggestion:
Update to version 48.0.3wasmtime-internal-cranelift (RUST):
Affected version(s) =49.0.0 <49.0.1Fix Suggestion:
Update to version 49.0.1wasmtime (RUST):
Affected version(s) =49.0.0 <49.0.1Fix Suggestion:
Update to version 49.0.1Related 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
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:
5.7
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Uncontrolled Resource Consumption