TI-2023-28308 Aliases CVE-2023-51661 GHSA-4mq4-7rw3-vm5j

Filesystem sandbox not enforced in wasmer-cli

HIGH 78CWE-284Published 2023-12-22 · Updated 2025-04-17

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-284.

Summary

Wasmer is a WebAssembly runtime that enables containers to run anywhere: from Desktop to the Cloud, Edge and even the browser. Wasm programs can access the filesystem outside of the sandbox. Service providers running untrusted Wasm code on Wasmer can unexpectedly expose the host filesystem. This vulnerability has been patched in version 4.2.4.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00595 48th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed wasmer (wasmerio): 4.2.4wasmer-cli (crates.io): 4.2.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
wasmerio	wasmer	3.0.0 to before 4.2.4	4.2.4	Patch available	CNA
—	wasmer-cli (crates.io)	3.0.0 to before 4.2.4	4.2.4	Patch available	GHSA-4mq4-7rw3-vm5j

wasmer Vendorwasmerio Affected 3.0.0 to before 4.2.4 Fixed in 4.2.4 Patch available CNA
wasmer-cli (crates.io) Vendor— Affected 3.0.0 to before 4.2.4 Fixed in 4.2.4 Patch available GHSA-4mq4-7rw3-vm5j

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:wasmer:wasmer::::::rust::*	3.0.0 to before 4.2.4	Vulnerable	Wasmer

cpe:2.3:a:wasmer:wasmer:*:*:*:*:*:rust:*:* Versions 3.0.0 to before 4.2.4 Vulnerable ·Wasmer

Remediation

Fix · CNA wasmer (wasmerio) Fixed in 4.2.4
Fix · GHSA-4mq4-7rw3-vm5j wasmer-cli (crates.io) Fixed in 4.2.4 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2023-51661
2026-10-03 Alias added: GHSA-4mq4-7rw3-vm5j

References

Other 3

TI-2024-25616 Symlink bypasses filesystem sandbox in wasmer CVSS 3.1LOW 2.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences