CVE-2023-23557

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Source

https://cve.org/CVERecord?id=CVE-2023-23557

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-23557.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2023-23557

Published

2023-05-18T21:19:41.668Z

Modified

2026-07-22T02:24:37.681192Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

[none]

Details

An error in Hermes' algorithm for copying objects properties prior to commit a00d237346894c6067a594983be6634f4168c9ad could be used by a malicious attacker to execute arbitrary code via type confusion. Note that this is only exploitable in cases where Hermes is used to execute untrusted JavaScript. Hence, most React Native applications are not affected.

Database specific

{
    "cna_assigner": "facebook",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/23xxx/CVE-2023-23557.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "fixed": "a00d237346894c6067a594983be6634f4168c9ad"
                }
            ]
        }
    ]
}

References

Affected packages

Git / github.com/facebook/hermes

Affected ranges

Type

GIT

Repo

https://github.com/facebook/hermes

Events

Introduced

Fixed

a00d237346894c6067a594983be6634f4168c9ad

Database specific

{
    "source": "REFERENCES"
}

Affected versions

hermes-2022-04-28-RNv0.*

hermes-2022-04-28-RNv0.69.0-15d07c2edd29a4ea0b8f15ab0588a0c1adb1200f

hermes-2022-07-15-RNv0.*

hermes-2022-07-15-RNv0.70.0-88dd5731a19ab6b38b0a0a2d4386ba959f2a2c98

hermes-2022-11-03-RNv0.*

hermes-2022-11-03-RNv0.71.0-85613e1f9d1216f2cce7e54604be46057092939d

v0.*

v0.1.0

v0.1.1

v0.10.0

v0.11.0

v0.12.0

v0.2.1

v0.3.0

v0.4.0

v0.5.0

v0.6.0

v0.7.0

v0.8.0

v0.9.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-23557.json"

vanir_signatures

[
    {
        "source": "https://github.com/facebook/hermes/commit/a00d237346894c6067a594983be6634f4168c9ad",
        "signature_type": "Function",
        "signature_version": "v1",
        "digest": {
            "function_hash": "8395603693698833939534980291523318968",
            "length": 2320.0
        },
        "id": "CVE-2023-23557-02894e1c",
        "target": {
            "function": "copyDataPropertiesSlowPath_RJS",
            "file": "lib/VM/JSLib/HermesBuiltin.cpp"
        },
        "deprecated": false
    },
    {
        "source": "https://github.com/facebook/hermes/commit/a00d237346894c6067a594983be6634f4168c9ad",
        "signature_type": "Line",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "77627020597537129274494186182116957713",
                "229681405995999209748563542684463771875",
                "101649061889427670724126921299133898665",
                "86018539367285934929526100720264182212",
                "33487740629654664825913083581045844412",
                "193897989513804375622153393972872860077",
                "277564282975645437591822380018736748488",
                "112643499639199942202607250416064789274",
                "270747886387742996922051881990963001589",
                "308371544382695045525090257873447451652",
                "170967911116524248165279416188959039664",
                "250895477241647975225062273855214121139",
                "203973018404123638894090593720568051885",
                "179361213868422231881822291723891865820",
                "288296997727176142438815503438246724802",
                "141606201955996406519322802485975749699",
                "175900176767969450832702885143858413835",
                "56191818645604432493974082368583872103",
                "116444120346204695034001680112211927869",
                "253012822976032640900097718633084555065",
                "298663305113426917555504953333386150905",
                "166277646441673397650885952230986727303",
                "22910912513970594542665255220016435542",
                "290893221946458496625473183928021022587",
                "286206647176154286588139365493737178726",
                "258364155691293956256725874979068866533",
                "232171521363151848080318833303528832964",
                "243142768503722443173766802757986541710",
                "142468980540149585008122041662328359387"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2023-23557-3bd6282b",
        "target": {
            "file": "lib/VM/JSLib/HermesBuiltin.cpp"
        },
        "deprecated": false
    },
    {
        "source": "https://github.com/facebook/hermes/commit/a00d237346894c6067a594983be6634f4168c9ad",
        "signature_type": "Line",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "193426243138791153072749391442658939339",
                "135796777696127301412320752450796660176",
                "334255473916679492100366393447494822222"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2023-23557-65e10e61",
        "target": {
            "file": "unittests/API/APITest.cpp"
        },
        "deprecated": false
    },
    {
        "source": "https://github.com/facebook/hermes/commit/a00d237346894c6067a594983be6634f4168c9ad",
        "signature_type": "Function",
        "signature_version": "v1",
        "digest": {
            "function_hash": "298634487191324420472805239785196329758",
            "length": 2854.0
        },
        "id": "CVE-2023-23557-d4875896",
        "target": {
            "function": "hermesBuiltinCopyDataProperties",
            "file": "lib/VM/JSLib/HermesBuiltin.cpp"
        },
        "deprecated": false
    }
]

vanir_signatures_modified

"2026-07-22T02:24:37Z"