CVE-2025-26619: vega_project vega Cross-site Scripting

Vulnerability summary

CVE-2025-26619 is a medium (CVSS 6.1) Cross-site Scripting vulnerability in vega_project vega. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.8% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 27-03-2025
   PublishedVulnerability first disclosed.
2. 27-03-2025
   Last modifiedVulnerability information updated.

Description

Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. In `vega` 5.30.0 and lower and in `vega-functions` 5.15.0 and lower , it was possible to call JavaScript functions from the Vega expression language that were not meant to be supported. The issue is patched in `vega` `5.31.0` and `vega-functions` `5.16.0`. Some workarounds are available. Run `vega` without `vega.expressionInterpreter`. This mode is not the default as it is slower. Alternatively, using the interpreter described in CSP safe mode (Content Security Policy) prevents arbitrary Javascript from running, so users of this mode are not affected by this vulnerability.

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.