vega-util prior to 1.13.1 allows manipulation of object prototype. The 'vega.mergeConfig' method within vega-util could be tricked into adding or modifying properties of the Object.prototype.
// cvss v3.1 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Checked 2026-10-04 at 01:14 UTC. The most recent advisory here was published 2021-05-07. Updated continuously from NVD, GHSA, OSV and CNA feeds.