CVE-2026-44267

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Source

https://cve.org/CVERecord?id=CVE-2026-44267

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44267.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-44267

Aliases

GHSA-33r5-xmm8-v6x5

Published

2026-11-03T17:52:25Z

Modified

2026-11-04T02:47:41Z

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

Elo: Sandbox escape to arbitrary Node.js / browser code execution via unfiltered `.constructor` member access in Elo JavaScript emitter

Details

Elo is a purely functional expression language for no-code tools. Prior to 1.0.1, plain Elo strings supplied to defaultFormats.elo.parse(), bin/elo, or elo-lang.org/try can use .constructor.constructor to reach JavaScript Function because the member_access handler in src/transform.ts does not reject meta-properties, src/compilers/javascript.ts emits the surviving property directly, and src/parser.ts accepts constructor as an ordinary identifier. The resulting generated JavaScript executes attacker-selected code in the host runtime. This permits browser script execution and session compromise on the auto-running playground and arbitrary Node.js code execution on library, CI, or DevOps hosts. This plain-string path is distinct from the programmatic AST-object injection issue. This issue is fixed in version 1.0.1.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-1336",
        "CWE-693",
        "CWE-79",
        "CWE-94"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44267.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "fixed": "1.0.1"
                        }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                }
            ]
        },
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "fixed": "1.0.1"
                        },
                        {
                            "fixed": "1.0.1"
                        }
                    ],
                    "source": "DESCRIPTION"
                }
            ]
        }
    ]
}

References

Affected packages

Git / github.com/enspirit/elo

Affected ranges

Type

GIT

Repo

https://github.com/enspirit/elo

Events

Introduced

Fixed

2136da1f64eec8ebf99890d3100be9394534b842

Fixed

d2a89a8db76a244eb740687524a7e8529b7554b5

Database specific

Show details

{
    "extracted_events": [
        {
            "range": [
                {
                    "fixed": "2136da1f64eec8ebf99890d3100be9394534b842"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "d2a89a8db76a244eb740687524a7e8529b7554b5"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

v0.*

v0.9.1

v0.9.10

v0.9.11

v0.9.12

v0.9.14

v0.9.2

v0.9.3

v0.9.4

v0.9.5

v0.9.6

v0.9.7

v0.9.8

v0.9.9

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44267.json"