Bug 2355332 (CVE-2025-26619)

Summary: CVE-2025-26619 vega: Vega Cross-Site Scripting (XSS) via event filter when not using CSP mode `expressionInterpeter`
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: caswilli, kaycoth
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A Cross-site scripting vulnerability was found in the Vega library for Node.js. In affected versions, it is possible to call JavaScript functions from the Vega expression language that were not meant to be supported.
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Bug Depends On: 2355646, 2355647    
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Description OSIDB Bzimport 2025-03-27 14:01:37 UTC 
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.