{"api_version":"1","generated_at":"2026-07-23T13:24:11+00:00","cve":"CVE-2023-26487","urls":{"html":"https://cve.report/CVE-2023-26487","api":"https://cve.report/api/cve/CVE-2023-26487.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-26487","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-26487"},"summary":{"title":"CVE-2023-26487","description":"Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs.`lassoAppend' function accepts 3 arguments and internally invokes `push` function on the 1st argument specifying array consisting of 2nd and 3rd arguments as `push` call argument. The type of the 1st argument is supposed to be an array, but it's not enforced. This makes it possible to specify any object with a `push` function as the 1st argument, `push` function can be set to any function that can be access via `event.view` (no all such functions can be exploited due to invalid context or signature, but some can, e.g. `console.log`). The issue is that`lassoAppend` doesn't enforce proper types of its arguments. This issue opens various XSS vectors, but exact impact and severity depends on the environment (e.g. Core JS `setImmediate` polyfill basically allows `eval`-like functionality). This issue was patched in 5.23.0.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2023-03-04 00:15:00","updated_at":"2023-11-07 04:09:00"},"problem_types":["CWE-79"],"metrics":[],"references":[{"url":"https://github.com/vega/vega/releases/tag/v5.23.0","name":"https://github.com/vega/vega/releases/tag/v5.23.0","refsource":"MISC","tags":[],"title":"Release v5.23.0 · vega/vega · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/vega/vega/commit/01adb034f24727d3bb321bbbb6696a7f4cd91689","name":"https://github.com/vega/vega/commit/01adb034f24727d3bb321bbbb6696a7f4cd91689","refsource":"MISC","tags":[],"title":"fix: lassoAppend XSS w/typecheck + array spread instead of push · vega/vega@01adb03 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/vega/vega/security/advisories/GHSA-w5m3-xh75-mp55","name":"https://github.com/vega/vega/security/advisories/GHSA-w5m3-xh75-mp55","refsource":"MISC","tags":[],"title":"XSS vulnerability in `lassoAppend` function · Advisory · vega/vega · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-26487","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-26487","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2023","cve_id":"26487","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"vega-functions_project","cpe5":"vega-functions","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"node.js","cpe12":"*","cpe13":"*"},{"cve_year":"2023","cve_id":"26487","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"vega_project","cpe5":"vega","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"node.js","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2023-26487","ASSIGNER":"security-advisories@github.com","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs.`lassoAppend' function accepts 3 arguments and internally invokes `push` function on the 1st argument specifying array consisting of 2nd and 3rd arguments as `push` call argument. The type of the 1st argument is supposed to be an array, but it's not enforced. This makes it possible to specify any object with a `push` function as the 1st argument, `push` function can be set to any function that can be access via `event.view` (no all such functions can be exploited due to invalid context or signature, but some can, e.g. `console.log`). The issue is that`lassoAppend` doesn't enforce proper types of its arguments. This issue opens various XSS vectors, but exact impact and severity depends on the environment (e.g. Core JS `setImmediate` polyfill basically allows `eval`-like functionality). This issue was patched in 5.23.0."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","cweId":"CWE-79"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"vega","product":{"product_data":[{"product_name":"vega","version":{"version_data":[{"version_affected":"=","version_value":"< 5.23.0"}]}}]}}]}},"references":{"reference_data":[{"url":"https://github.com/vega/vega/releases/tag/v5.23.0","refsource":"MISC","name":"https://github.com/vega/vega/releases/tag/v5.23.0"},{"url":"https://github.com/vega/vega/security/advisories/GHSA-w5m3-xh75-mp55","refsource":"MISC","name":"https://github.com/vega/vega/security/advisories/GHSA-w5m3-xh75-mp55"},{"url":"https://github.com/vega/vega/commit/01adb034f24727d3bb321bbbb6696a7f4cd91689","refsource":"MISC","name":"https://github.com/vega/vega/commit/01adb034f24727d3bb321bbbb6696a7f4cd91689"}]},"source":{"advisory":"GHSA-w5m3-xh75-mp55","discovery":"UNKNOWN"},"impact":{"cvss":[{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}]}},"nvd":{"publishedDate":"2023-03-04 00:15:00","lastModifiedDate":"2023-11-07 04:09:00","problem_types":["CWE-79"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.8,"impactScore":2.7}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:vega-functions_project:vega-functions:*:*:*:*:*:node.js:*:*","versionEndExcluding":"5.13.1","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:vega_project:vega:*:*:*:*:*:node.js:*:*","versionEndExcluding":"5.23.0","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}