{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-09-30T02:35:48.014","vulnerabilities":[{"cve":{"id":"CVE-2026-27166","sourceIdentifier":"security-advisories@github.com","published":"2026-03-19T21:17:08.740","lastModified":"2026-06-17T10:26:46.800","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Discourse is an open source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1 and  2026.1.2, insufficient cleanup in the default Codepen allowed iframes value allows an attacker to trick a user into changing the URL of the main page. This issue has been fixed in versions 2026.3.0-latest.1, 2026.2.1 and  2026.1.2. To workaround this issue, remove Codepen from the list of allowed iframes."},{"lang":"es","value":"Discourse es una plataforma de discusión de código abierto. Antes de las versiones 2026.3.0-latest.1, 2026.2.1 y 2026.1.2, una limpieza insuficiente en el valor predeterminado de iframes permitidos de Codepen permite a un atacante engañar a un usuario para que cambie la URL de la página principal. Este problema ha sido solucionado en las versiones 2026.3.0-latest.1, 2026.2.1 y 2026.1.2. Como solución alternativa a este problema, elimine Codepen de la lista de iframes permitidos."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"discourse","product":"discourse","versions":[{"version":"< 2026.3.0-latest.1","status":"affected"},{"version":">= 2026.2.0-latest, < 2026.2.1","status":"affected"},{"version":">= 2026.1.0-latest, < 2026.1.2","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N","baseScore":4.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.3,"impactScore":1.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","baseScore":5.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.3,"impactScore":2.7}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-03-21T03:31:46.439342Z","id":"CVE-2026-27166","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-80"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*","versionEndExcluding":"2026.3.0","matchCriteriaId":"0B441F8E-6577-4447-B9B4-767A925FAD77"},{"vulnerable":true,"criteria":"cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*","versionStartIncluding":"2026.1.0","versionEndExcluding":"2026.1.2","matchCriteriaId":"4BE96625-3609-410C-B41E-4A824C1A57C0"},{"vulnerable":true,"criteria":"cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*","versionStartIncluding":"2026.2.0","versionEndExcluding":"2026.2.1","matchCriteriaId":"FD31CF04-CF2F-4FB9-8880-9243BC7671A7"},{"vulnerable":true,"criteria":"cpe:2.3:a:discourse:discourse:2026.3.0:*:*:*:latest:*:*:*","matchCriteriaId":"E3FE9277-4F6B-4FD0-991F-F0FB8D226E1C"}]}]}],"references":[{"url":"https://github.com/discourse/discourse/commit/c4762a4fac2f61f52f325396b11d3aeb955ea925","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-h653-cq78-vjj2","source":"security-advisories@github.com","tags":["Vendor Advisory"]}]}}]}