# CVE-2023-26487: vega.js: Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization des...

CVE-2023-26487 is fixed in vega.js on 1 platform, first by DEBIAN-CVE-2023-26487, released March 4, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2023-26487
- Priority: Routine
- CVSS: 6.1 (medium)
- EPSS: 0.0081
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 4, 2023

## Description

Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs.`lassoAppend' function accepts 3 arguments and internally invokes `push` function on the 1st argument specifying array consisting of 2nd and 3rd arguments as `push` call argument. The type of the 1st argument is supposed to be an array, but it's not enforced. This makes it possible to specify any object with a `push` function as the 1st argument, `push` function can be set to any function that can be access via `event.view` (no all such functions can be exploited due to invalid context or signature, but some can, e.g. `console.log`). The issue is that`lassoAppend` doesn't enforce proper types of its arguments. This issue opens various XSS vectors, but exact impact and severity depends on the environment (e.g. Core JS `setImmediate` polyfill basically allows `eval`-like functionality). This issue was patched in 5.23.0.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | vega.js Debian 13.5 (trixie) | 5.25.0+ds+~cs5.3.0-1 | [DEBIAN-CVE-2023-26487](https://patchblox.com/security/data/fix/linux/debian-cve-2023-26487.md) | Mar 4, 2023 |
| Linux | vega.js Debian 14 | 5.25.0+ds+~cs5.3.0-1 | [DEBIAN-CVE-2023-26487](https://patchblox.com/security/data/fix/linux/debian-cve-2023-26487.md) | Mar 4, 2023 |

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