CVE-2026-115392

High

Description

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.

SeverityHigh

CVSS7.9

Exploit probability—

ProductBytecodealliance Wasmtime

PublishedOct 22, 2026

First seenOct 22, 2026

Weakness typeCWE-61CWE-61

How to fix

Update

bytecodealliance wasmtime24.0.13, 36.0.14, 46.0.3, 47.0.4 or later

Vendor advisories

github.com/bytecodealliance/wasmtime/security/advisories/GHSA-vqjp-4c8c-hfgg

Affected products

Product	Affected versions	Fixed in
bytecodealliance wasmtime	v < 24.0.13, 25.0.0 ≤ v < 36.0.14, 37.0.0 ≤ v < 46.0.3, 47.0.0 ≤ v < 47.0.4	24.0.13, 36.0.14, 46.0.3, 47.0.4

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