CVE-2025-14956

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Source
https://cve.org/CVERecord?id=CVE-2025-14956
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-14956.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-14956
Downstream
Related
Published
2025-12-19T16:32:12Z
Modified
2026-10-21T09:04:31Z
Severity
  • 1.9 (Low) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
WebAssembly Binaryen wasm-binary.cpp readExport heap-based overflow
Details

A vulnerability was determined in WebAssembly Binaryen up to 125. Affected by this issue is the function WasmBinaryReader::readExport of the file src/wasm/wasm-binary.cpp. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Patch name: 4f52bff8c4075b5630422f902dd92a0af2c9f398. It is recommended to apply a patch to fix this issue.

Database specific 
{
    "cna_assigner":  "VulDB",
    "cwe_ids":  [
        "CWE-119",
        "CWE-122"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/14xxx/CVE-2025-14956.json"
}
References

Affected packages

Git / github.com/webassembly/binaryen

Affected ranges

Type
GIT
Repo
https://github.com/webassembly/binaryen
Events
Introduced
6ec7b5f9c615d3b224c67ae221d6812c8f8e1a96
Fixed
4f52bff8c4075b5630422f902dd92a0af2c9f398
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "125"
                },
                {
                    "last_affected":  "125"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "fixed":  "4f52bff8c4075b5630422f902dd92a0af2c9f398"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

Other
125
version_125

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-14956.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "297504919989245700610474729391651764270",
            "length":  357
        },
        "id":  "CVE-2025-14956-31b4e4e1",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/webassembly/binaryen/commit/4f52bff8c4075b5630422f902dd92a0af2c9f398",
        "target":  {
            "file":  "src/wasm/wasm-binary.cpp",
            "function":  "WasmBinaryReader::readExpression"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "201480928520681906379950524024727729655",
                "334726967807214632206129284775153697474",
                "304652278790085127732226364469106342570",
                "38127243108464750520046628332426506894",
                "71237723187431418267481440117115206607",
                "252088095133434476482696689927987076667",
                "249611125164174963394737326246462431268",
                "1411843634869612402975512596183721162",
                "242793103065672669814075219089174268581"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2025-14956-646ed37d",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/webassembly/binaryen/commit/4f52bff8c4075b5630422f902dd92a0af2c9f398",
        "target":  {
            "file":  "src/wasm/wasm-binary.cpp"
        }
    }
]
vanir_signatures_modified 
"2026-10-21T09:04:31Z"