{"id":"CVE-2023-26487","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-26487","generatedAt":"2026-10-23T20:06:45.716Z","title":"This issue opens various XSS vectors, but exact impact and severity depends on the environment (e.g.","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.\n","published":"2023-03-04T00:15:16.000Z","lastModified":"2026-06-17T05:43:27.000Z","status":"Modified","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-79"],"affected":["vega-functions project/vega-functions","vega project/vega"],"epss":{"score":0.00806,"percentile":0.56366,"date":"2026-10-22","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.81%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/vega/vega/commit/01adb034f24727d3bb321bbbb6696a7f4cd91689","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/vega/vega/releases/tag/v5.23.0","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/vega/vega/security/advisories/GHSA-w5m3-xh75-mp55","tags":["Exploit","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/vega/vega/commit/01adb034f24727d3bb321bbbb6696a7f4cd91689","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/vega/vega/releases/tag/v5.23.0","tags":["Release Notes"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/vega/vega/security/advisories/GHSA-w5m3-xh75-mp55","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-26487","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}