CVE-2025-59840

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Source
https://cve.org/CVERecord?id=CVE-2025-59840
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-59840.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-59840
Aliases
Downstream
Related
Published
2025-11-13T19:54:26.256Z
Modified
2026-07-15T01:49:16.798699350Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N CVSS Calculator
Summary
Vega Cross-Site Scripting (XSS) via expressions abusing toString calls in environments using the VEGA_DEBUG global variable
Details

Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. In Vega prior to version 6.2.0, applications meeting 2 conditions are at risk of arbitrary JavaScript code execution, even if "safe mode" expressionInterpreter is used. They are vulnerable if they use vega in an application that attaches vega library and a vega.View instance similar to the Vega Editor to the global window and if they allow user-defined Vega JSON definitions (vs JSON that was is only provided through source code). Patches are available in the following Vega applications. If using the latest Vega line (6.x), upgrade to vega 6.2.0 / vega-expression 6.1.0 / vega-interpreter 2.2.1 (if using AST evaluator mode). If using Vega in a non-ESM environment, upgrade to vega-expression 5.2.1 / 1.2.1 (if using AST evaluator mode). Some workarounds are available. Do not attach vega View instances to global variables, and do not attach vega to the global window. These practices of attaching the vega library and View instances may be convenient for debugging, but should not be used in production or in any situation where vega/vega-lite definitions could be provided by untrusted parties.

Database specific 
{
    "cwe_ids": [
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/59xxx/CVE-2025-59840.json",
    "cna_assigner": "GitHub_M",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "vega-expression >= 6.0.0, < 6.1.0"
                },
                {
                    "last_affected": "vega-expression >= 6.0.0, < 6.1.0"
                },
                {
                    "introduced": "vega-expression < 5.2.1"
                },
                {
                    "last_affected": "vega-expression < 5.2.1"
                },
                {
                    "introduced": "vega-interpreter >= 2.0.0, < 2.2.1"
                },
                {
                    "last_affected": "vega-interpreter >= 2.0.0, < 2.2.1"
                },
                {
                    "introduced": "vega-interpreter < 1.2.1"
                },
                {
                    "last_affected": "vega-interpreter < 1.2.1"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/vega/vega

Affected ranges

Type
GIT
Repo
https://github.com/vega/vega
Events
Introduced
4dea72921d25bf6ff6636a9f9cb6c63ff696932c
Last affected
4dea72921d25bf6ff6636a9f9cb6c63ff696932c
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "vega < 6.2.0"
        },
        {
            "last_affected": "vega < 6.2.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v6.*
v6.2.0
vega < 6.*
vega < 6.2.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-59840.json"