CVE-2026-115392
Published:October 22, 2026
Updated:October 23, 2026
Wasmtime before 24.0.13, 25.0.0 before 36.0.14, 37.0.0 before 46.0.3, and 47.0.0 before 47.0.4 allows a filesystem sandbox escape in wasmtime-wasi because its cap-std dependency mishandles symlinks with trailing slashes on macOS and Linux kernels lacking openat2. A guest with write access to any sandboxed directory can read and write any host-accessible file, and read-only guests may read host files via preexisting symlinks.
Affected Packages
https://github.com/bytecodealliance/cap-std.git (GITHUB):
Affected version(s) >=v4.0.0 <v4.0.3Fix Suggestion:
Update to version v4.0.3https://github.com/bytecodealliance/cap-std.git (GITHUB):
Affected version(s) >=v3.0.0 <v3.4.6Fix Suggestion:
Update to version v3.4.6cap-std (RUST):
Affected version(s) >=4.0.0 <4.0.3Fix Suggestion:
Update to version 4.0.3cap-std (RUST):
Affected version(s) >=3.0.0 <3.4.6Fix Suggestion:
Update to version 3.4.6cap-primitives (RUST):
Affected version(s) >=3.0.0 <3.4.6Fix Suggestion:
Update to version 3.4.6cap-primitives (RUST):
Affected version(s) >=4.0.0 <4.0.3Fix Suggestion:
Update to version 4.0.3Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
LOW
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
LOW
CVSS v3
Base Score:
7.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
LOW
Weakness Type (CWE)
UNIX Symbolic Link (Symlink) Following