CVE-2026-115893

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Source
https://cve.org/CVERecord?id=CVE-2026-115893
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115893.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-115893
Aliases
Downstream
AZL (2)
CGA (8)
DEBIAN (1)
UBUNTU (1)
Published
2026-10-23T21:29:33Z
Modified
2026-10-31T02:30:30Z
Severity
  • 9.9 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
Wasmtime: Cranelift backend on aarch64 can jump to incorrect target on large Wasm `br_table` instruction
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-691"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115893.json"
}
References

Affected packages

Git / github.com/bytecodealliance/wasmtime

Affected ranges

Type
GIT
Repo
https://github.com/bytecodealliance/wasmtime
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
0d6b8ead4e94b0ce76f925611b831b56570aef94
Introduced
7b3d6ae79e9153a2477668062f5622c10333925f
Fixed
c6846e13f64b07b7912d372db141397058b55f99
Introduced
17830bd3c0331d920a8aa38846eebc4d46d98c23
Fixed
2c2970205fe05d6bbf15b9bff6f1e67874b2db5c
Fixed
222ff3a65dab9aa7011f8c246937751a0bac5abd
Fixed
994549891c8a706cb4f2809f9d17b9f67b31e618
Fixed
e61df1b454be9313d61a5f8de07722a421139bbe
Fixed
f517bd6e890c7c1291ab9fe05d8cc0c9f11e56aa
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "36.0.19"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "introduced": "37.0.0"
                },
                {
                    "fixed": "48.0.7"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "introduced": "49.0.0"
                },
                {
                    "fixed": "49.0.4"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "222ff3a65dab9aa7011f8c246937751a0bac5abd"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "994549891c8a706cb4f2809f9d17b9f67b31e618"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "e61df1b454be9313d61a5f8de07722a421139bbe"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "f517bd6e890c7c1291ab9fe05d8cc0c9f11e56aa"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v36.0.19",
            "range": [
                {
                    "fixed": "0d6b8ead4e94b0ce76f925611b831b56570aef94"
                }
            ],
            "source": "REFERENCES_TAG"
        },
        {
            "original_tag": "v48.0.7",
            "range": [
                {
                    "fixed": "c6846e13f64b07b7912d372db141397058b55f99"
                }
            ],
            "source": "REFERENCES_TAG"
        },
        {
            "original_tag": "v49.0.4",
            "range": [
                {
                    "fixed": "2c2970205fe05d6bbf15b9bff6f1e67874b2db5c"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

cranelift-v0.*
cranelift-v0.60.0
cranelift-v0.61.0
cranelift-v0.69.0
Other
dev
v0.*
v0.12.0
v0.16.0
v0.17.0
v0.18.0
v0.19.0
v0.20.0
v0.21.0
v0.22.0
v0.23.0
v0.24.0
v0.25.0
v0.26.0
v0.27.0
v0.28.0
v0.29.0
v0.30.0
v0.31.0
v0.32.0
v0.33.0
v0.34.0
v0.35.0
v36.*
v36.0.0
v36.0.1
v36.0.10
v36.0.11
v36.0.12
v36.0.13
v36.0.14
v36.0.15
v36.0.16
v36.0.17
v36.0.18
v36.0.2
v36.0.3
v36.0.4
v36.0.5
v36.0.6
v36.0.7
v36.0.8
v36.0.9
v48.*
v48.0.0
v48.0.1
v48.0.2
v48.0.3
v48.0.4
v48.0.5
v48.0.6
v49.*
v49.0.0
v49.0.1
v49.0.2
v49.0.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115893.json"