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CVE-2026-115392

7.9 · HIGH

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…

Published Oct 22, 2026CWE-61EPSS 0.24%

Overview

CVE-2026-115392 is a high-severity vulnerability. It was published on October 22, 2026 and has a CVSS 3.1 base score of 7.9 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.9, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/bytecodealliance/wasmtime/security/advisories/GHSA-vqjp-4c8c-hfggRefwww.vulncheck.com/advisories/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-sandbox-escape-via-trailing-slashes

How CyberStrike helps

Frequently asked questions

What is CVE-2026-115392?

CVE-2026-115392 is a high-severity vulnerability. It was published on October 22, 2026 and has a CVSS 3.1 base score of 7.9 (HIGH).

How severe is CVE-2026-115392?

This vulnerability has a CVSS 3.1 base score of 7.9, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-115392?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-115392?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-115392 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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