Bytecode Alliance Wasmtime up to 24.0.12/36.0.13/46.0.2/47.0.3 Wasi sandbox

CVSS Meta Temp Score
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CTI Interest Score
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6.9$0-$5k1.18-

Summaryinfo

A vulnerability classified as critical was found in Bytecode Alliance Wasmtime up to 24.0.12/36.0.13/46.0.2/47.0.3. The impacted element is an unknown function of the component Wasi. Such manipulation leads to sandbox. This vulnerability is uniquely identified as CVE-2026-115392. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Bytecode Alliance Wasmtime up to 24.0.12/36.0.13/46.0.2/47.0.3. Affected by this issue is an unknown function of the component Wasi. The manipulation with an unknown input leads to a sandbox vulnerability. Using CWE to declare the problem leads to CWE-265. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-115392 since 10/22/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1611.

Upgrading to version 24.0.13, 36.0.14, 46.0.3 or 47.0.4 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.9
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Sandbox
CWE: CWE-265 / CWE-264
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Wasmtime 24.0.13/36.0.14/46.0.3/47.0.4

Timelineinfo

10/22/2026 Advisory disclosed
10/22/2026 +0 days CVE reserved
10/22/2026 +0 days VulDB entry created
10/22/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-115392 (🔒)
GCVE (CVE): GCVE-0-2026-115392
GCVE (VulDB): GCVE-100-425432

Entryinfo

Created: 10/22/2026 22:17
Changes: 10/22/2026 22:17 (76)
Complete: 🔍
Cache ID: 216::103

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