CVE-2020-1914

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Source
https://cve.org/CVERecord?id=CVE-2020-1914
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-1914.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-1914
Aliases
Downstream
Published
2020-10-08T19:15:12Z
Modified
2026-10-29T07:24:11Z
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

A logic vulnerability when handling the SaveGeneratorLong instruction in Facebook Hermes prior to commit b2021df620824627f5a8c96615edbd1eb7fdddfc allows attackers to potentially read out of bounds or theoretically execute arbitrary code via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.

Database specific 
{
    "unresolved_ranges": [
        {
            "cpes": [
                "cpe:2.3:a:facebook:hermes:*:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "range": [
                        {
                            "fixed": "2020-10-01"
                        }
                    ],
                    "source": "CPE_RANGE"
                }
            ],
            "vendor_product": "facebook:hermes"
        }
    ]
}
References

Affected packages

Git / github.com/facebook/hermes

Affected ranges

Type
GIT
Repo
https://github.com/facebook/hermes
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b2021df620824627f5a8c96615edbd1eb7fdddfc
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "b2021df620824627f5a8c96615edbd1eb7fdddfc"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}

Affected versions

v0.*
v0.1.0
v0.1.1
v0.2.1
v0.3.0
v0.4.0
v0.5.0
v0.6.0
v0.7.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-1914.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "264383434278169305758865362435794456260",
                "76271904801096239230935603644833861131",
                "146835001213185705022272512464460210904",
                "210570179874108656330956328571994936363",
                "81910687812536689839731088775916563053",
                "136121027497276808367338578697424643274",
                "206430703044721234072769601555972370445",
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                "20622120592523609164277160054788065210",
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                "18509309836321432823910742130644565773",
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                "164845285803737957979778749259751343611",
                "269089315968286494101980403277059164404",
                "83452544947671549027578647915222245791",
                "224216718335748026483058946717149480044",
                "102913092489513992894307197525306448624",
                "184706754241457839244474718225622275814",
                "278499218663552256137556054748330650298",
                "20097087228129587505593203395247955599",
                "331178970046319945645413957070854895223",
                "267632302448148322876793350395896242101"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2020-1914-7b87d5a3",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/facebook/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc",
        "target": {
            "file": "lib/VM/Interpreter.cpp"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "239627296047632175408245401516108283608",
            "length": 65904
        },
        "id": "CVE-2020-1914-bbc25ae0",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/facebook/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc",
        "target": {
            "file": "lib/VM/Interpreter.cpp",
            "function": "Interpreter::interpretFunction"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "179983482675987937712928295585278775808",
                "166835343279817372637414812210345427256",
                "312118838365306741632746657157637573468"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2020-1914-d2c7158d",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/facebook/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc",
        "target": {
            "file": "include/hermes/VM/Interpreter.h"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "149996285039332532777077833660766082057",
                "335788309594270301477032780664985386154",
                "211413607963294137752909557711509214842",
                "149739945718658044461070928675895499080",
                "301933119673681439372789711091709958862",
                "7666850523561389404654852992919780966"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2020-1914-e61dc7be",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/facebook/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc",
        "target": {
            "file": "lib/VM/Interpreter-slowpaths.cpp"
        }
    }
]
vanir_signatures_modified 
"2026-10-29T07:24:11Z"

Git / github.com/meta/hermes

Affected ranges

Type
GIT
Repo
https://github.com/meta/hermes
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b2021df620824627f5a8c96615edbd1eb7fdddfc
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "fixed": "b2021df620824627f5a8c96615edbd1eb7fdddfc"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

v0.*
v0.1.0
v0.1.1
v0.2.1
v0.3.0
v0.4.0
v0.5.0
v0.6.0
v0.7.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-1914.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "179983482675987937712928295585278775808",
                "166835343279817372637414812210345427256",
                "312118838365306741632746657157637573468"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2020-1914-125375c8",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/meta/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc",
        "target": {
            "file": "include/hermes/VM/Interpreter.h"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "264383434278169305758865362435794456260",
                "76271904801096239230935603644833861131",
                "146835001213185705022272512464460210904",
                "210570179874108656330956328571994936363",
                "81910687812536689839731088775916563053",
                "136121027497276808367338578697424643274",
                "206430703044721234072769601555972370445",
                "127253530693054035434461344533253463866",
                "20622120592523609164277160054788065210",
                "260823001671683298417999139140271760739",
                "18509309836321432823910742130644565773",
                "299039658107690335694225241303692484975",
                "164845285803737957979778749259751343611",
                "269089315968286494101980403277059164404",
                "83452544947671549027578647915222245791",
                "224216718335748026483058946717149480044",
                "102913092489513992894307197525306448624",
                "184706754241457839244474718225622275814",
                "278499218663552256137556054748330650298",
                "20097087228129587505593203395247955599",
                "331178970046319945645413957070854895223",
                "267632302448148322876793350395896242101"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2020-1914-73259d56",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/meta/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc",
        "target": {
            "file": "lib/VM/Interpreter.cpp"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "149996285039332532777077833660766082057",
                "335788309594270301477032780664985386154",
                "211413607963294137752909557711509214842",
                "149739945718658044461070928675895499080",
                "301933119673681439372789711091709958862",
                "7666850523561389404654852992919780966"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2020-1914-bd1a33f3",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/meta/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc",
        "target": {
            "file": "lib/VM/Interpreter-slowpaths.cpp"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "239627296047632175408245401516108283608",
            "length": 65904
        },
        "id": "CVE-2020-1914-fab71554",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/meta/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc",
        "target": {
            "file": "lib/VM/Interpreter.cpp",
            "function": "Interpreter::interpretFunction"
        }
    }
]
vanir_signatures_modified 
"2026-10-29T07:24:11Z"