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CVE-2026-115893 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

Wasmtime is a runtime for WebAssembly. Prior to 36.0.19, 48.0.7, and 49.0.4, the Cranelift compiler backend on aarch64 can compile a Wasm br_table instruction with more than approximately 256,000 targets so that it has an incorrect conditional branch target. The branch can then jump to arbitrary other code at a user-controlled offset, allowing a user-controlled Wasm module to escape the sandbox on aarch64 engines using the default Cranelift backend. This issue is fixed in versions 36.0.19, 48.0.7, and 49.0.4.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:9 CRITICALVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CNA: [email protected]CVSS-B:9.9 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/bytecodealliance/wasmtime/commit/222ff3a65dab9aa7011f8c246937751a0bac5abd	[email protected]	Source CodeVendor
https://github.com/bytecodealliance/wasmtime/commit/994549891c8a706cb4f2809f9d17b9f67b31e618	[email protected]	Source CodeVendor
https://github.com/bytecodealliance/wasmtime/commit/e61df1b454be9313d61a5f8de07722a421139bbe	[email protected]	Source CodeVendor
https://github.com/bytecodealliance/wasmtime/commit/f517bd6e890c7c1291ab9fe05d8cc0c9f11e56aa	[email protected]	Source CodeVendor
https://github.com/bytecodealliance/wasmtime/pull/14818	[email protected]	Issue TrackingVendor
https://github.com/bytecodealliance/wasmtime/pull/14819	[email protected]	Issue TrackingVendor
https://github.com/bytecodealliance/wasmtime/pull/14820	[email protected]	Source CodeVendor
https://github.com/bytecodealliance/wasmtime/pull/14826	[email protected]	Issue TrackingVendor
https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.19	[email protected]	Release NotesVendor
https://github.com/bytecodealliance/wasmtime/releases/tag/v48.0.7	[email protected]	Release NotesVendor
https://github.com/bytecodealliance/wasmtime/releases/tag/v49.0.4	[email protected]	Release NotesVendor
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-mghf-wjfp-p5xm	[email protected]	AdvisoryRemedyVendor

see all 12 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-691	Insufficient Control Flow Management	[email protected]

Affected Products

Product	Versions
bytecodealliance Wasmtime	< 36.0.19 (semver) >= 37.0.0 (semver) < 48.0.7 (semver) >= 49.0.0 (semver) < 49.0.4 (semver)
CPE cpe:2.3:a:bytecodealliance:wasmtime::::::rust::* Remediation Upgrade: 36.0.19moderate effort Upgrade: 48.0.7moderate effort Upgrade: 49.0.4moderate effort

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 29, 2026	CVE Modified	CISA-ADP
Oct 23, 2026	New CVE Received	[email protected]