{"id":"CVE-2020-26296","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-26296","generatedAt":"2026-10-27T23:43:09.269Z","title":"In Vega before version 5.17.3 there is an XSS vulnerability in Vega expressions.","description":"Vega is a visualization grammar, a declarative format for creating, saving, and sharing interactive visualization designs. Vega in an npm package. In Vega before version 5.17.3 there is an XSS vulnerability in Vega expressions. Through a specially crafted Vega expression, an attacker could execute arbitrary javascript on a victim's machine. This is fixed in version 5.17.3","published":"2020-12-30T23:15:15.000Z","lastModified":"2026-06-17T03:08:01.000Z","status":"Modified","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":8.7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"},"cwe":["CWE-79"],"affected":["vega project/vega"],"epss":{"score":0.01713,"percentile":0.77224,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.71%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/vega/vega/issues/3018","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/vega/vega/pull/3019","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/vega/vega/releases/tag/v5.17.3","tags":["Release Notes","Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/vega/vega/security/advisories/GHSA-r2qc-w64x-6j54","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://www.npmjs.com/package/vega","tags":["Third Party Advisory"],"source":"security-advisories@github.com"},{"url":"https://github.com/vega/vega/issues/3018","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/vega/vega/pull/3019","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/vega/vega/releases/tag/v5.17.3","tags":["Release Notes","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/vega/vega/security/advisories/GHSA-r2qc-w64x-6j54","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.npmjs.com/package/vega","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-26296","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."}