CVE-2026-115392 Wasmtime - Sandbox Escape

Wasmtime < 24.0.13, 25.0.0 < 36.0.14, 37.0.0 < 46.0.3, and 47.0.0 < 47.0.4 contain a filesystem sandbox escape caused by mishandling symlinks with trailing slashes in cap-std dependency on macOS and Linux kernels lacking openat2, letting guest users with write access read/write host files, exploit requires guest write access to sandboxed directory.

CVSS base score 7.9 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Sandbox Escape
Impact
File System Read, File System Write, Information Disclosure, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L
Published
22 October 2026
Updated
23 October 2026
Weakness
CWE-61

Vendor fix

Update to versions 24.0.13, 36.0.14, 46.0.3, 47.0.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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