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CVE-2025-26619— Vega Cross-Site Scripting (XSS) via event filter when not using CSP mode `expressionInterpeter`

Quick assessment

Affected
vega vega
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Vega是Vega团队的一个基于Javscript可用来创建交互式可视化展示的软件。该软件可使用JSON格式描述数据可视化，并使用HTML5 Canvas或SVG生成交互式视图。 Vega 5.30.0及之前版本存在安全漏洞，该漏洞源于支持未预期的JavaScript函数调用。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.34% · P27

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2025-26619

Vulnerability Information
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Vulnerability Title
Vega Cross-Site Scripting (XSS) via event filter when not using CSP mode `expressionInterpeter`
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Vega 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vega是Vega团队的一个基于Javscript可用来创建交互式可视化展示的软件。该软件可使用JSON格式描述数据可视化，并使用HTML5 Canvas或SVG生成交互式视图。 Vega 5.30.0及之前版本存在安全漏洞，该漏洞源于支持未预期的JavaScript函数调用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
vega vega < 5.31.0 -

II. Public POCs for CVE-2025-26619

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III. Intelligence Information for CVE-2025-26619

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Patches & Fixes for CVE-2025-26619 (1)

Vendor Advisories for CVE-2025-26619 (1)

Proof of Concept for CVE-2025-26619 (1)

Other References for CVE-2025-26619 (1)

IV. Related Vulnerabilities

Same product: vega
Same vendor: vega
Same weakness: CWE-79

V. Comments for CVE-2025-26619

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