{"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"}}]}}

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