{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52843","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-08T18:41:27.724Z","datePublished":"2026-07-15T16:16:07.762Z","dateUpdated":"2026-07-15T17:37:26.880Z"},"containers":{"cna":{"title":"Lightpanda: fetch() and XMLHttpRequest attach session cookies to cross-origin requests regardless of credentials mode","problemTypes":[{"descriptions":[{"cweId":"CWE-346","lang":"en","description":"CWE-346: Origin Validation Error","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.3,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/lightpanda-io/browser/security/advisories/GHSA-36mm-v3c2-24cc","tags":["x_refsource_CONFIRM"],"url":"https://github.com/lightpanda-io/browser/security/advisories/GHSA-36mm-v3c2-24cc"},{"name":"https://github.com/lightpanda-io/browser/pull/2155","tags":["x_refsource_MISC"],"url":"https://github.com/lightpanda-io/browser/pull/2155"},{"name":"https://github.com/lightpanda-io/browser/commit/2cdaac780bed65db98bbb6ed2ad5bc6011863c76","tags":["x_refsource_MISC"],"url":"https://github.com/lightpanda-io/browser/commit/2cdaac780bed65db98bbb6ed2ad5bc6011863c76"},{"name":"https://github.com/lightpanda-io/browser/releases/tag/0.2.9","tags":["x_refsource_MISC"],"url":"https://github.com/lightpanda-io/browser/releases/tag/0.2.9"}],"affected":[{"vendor":"lightpanda-io","product":"browser","versions":[{"version":"< 0.2.9","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-07-15T16:16:07.762Z"},"descriptions":[{"lang":"en","value":"Lightpanda is a headless browser designed for AI and automation. Prior to 0.2.9, Lightpanda fetch() and XMLHttpRequest unconditionally attached session cookies to every HTTP request, ignoring credentials: omit, credentials: same-origin, credentials: include, and XMLHttpRequest.withCredentials, allowing an attacker-controlled origin in a Lightpanda session to issue authenticated cross-origin requests against a victim origin. This issue is fixed in version 0.2.9."}],"source":{"advisory":"GHSA-36mm-v3c2-24cc","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-15T17:37:05.863200Z","id":"CVE-2026-52843","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-15T17:37:26.880Z"}}]}}