{"id":"CVE-2026-52842","state":"PUBLISHED","title":"Lightpanda:URL parser misidentifies page origin for URLs containing @ in the path - Same-Origin Policy bypass","description":"Lightpanda is a headless browser designed for AI and automation. Prior to 0.3.1, Lightpanda searched for @ across the entire URL string instead of only the authority component when computing a page origin, so a URL such as `http://attacker.com/@victim.com/` was fetched from attacker.com but treated as `http://victim.com`, allowing a complete Same-Origin Policy bypass. This issue is fixed in version 0.3.1.","publishedAt":"2026-07-15T16:18:26.157Z","updatedAt":"2026-07-15T16:35:28.146Z","severity":{"score":9.3,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["lightpanda-io browser"],"affected":[{"vendor":"lightpanda-io","product":"browser","versions":[{"version":"< 0.3.1","status":"affected"}]}],"references":["https://github.com/lightpanda-io/browser/security/advisories/GHSA-mq6p-m9cc-q432","https://github.com/lightpanda-io/browser/pull/1998","https://github.com/lightpanda-io/browser/commit/0588cc374d4af9687cf6f45a7d52f7af04bbacfb","https://github.com/lightpanda-io/browser/releases/tag/0.3.1"],"weaknesses":["CWE-346"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52842.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52842","state":"PUBLISHED","datePublished":"2026-07-15T16:18:26.157Z","dateUpdated":"2026-07-15T16:35:28.146Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-08T18:41:27.724Z"},"containers":{"cna":{"title":"Lightpanda:URL parser misidentifies page origin for URLs containing @ in the path - Same-Origin Policy bypass","descriptions":[{"lang":"en","value":"Lightpanda is a headless browser designed for AI and automation. Prior to 0.3.1, Lightpanda searched for @ across the entire URL string instead of only the authority component when computing a page origin, so a URL such as `http://attacker.com/@victim.com/` was fetched from attacker.com but treated as `http://victim.com`, allowing a complete Same-Origin Policy bypass. This issue is fixed in version 0.3.1."}],"affected":[{"vendor":"lightpanda-io","product":"browser","versions":[{"version":"< 0.3.1","status":"affected"}]}],"references":[{"url":"https://github.com/lightpanda-io/browser/security/advisories/GHSA-mq6p-m9cc-q432","name":"https://github.com/lightpanda-io/browser/security/advisories/GHSA-mq6p-m9cc-q432","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/lightpanda-io/browser/pull/1998","name":"https://github.com/lightpanda-io/browser/pull/1998","tags":["x_refsource_MISC"]},{"url":"https://github.com/lightpanda-io/browser/commit/0588cc374d4af9687cf6f45a7d52f7af04bbacfb","name":"https://github.com/lightpanda-io/browser/commit/0588cc374d4af9687cf6f45a7d52f7af04bbacfb","tags":["x_refsource_MISC"]},{"url":"https://github.com/lightpanda-io/browser/releases/tag/0.3.1","name":"https://github.com/lightpanda-io/browser/releases/tag/0.3.1","tags":["x_refsource_MISC"]}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-346","lang":"en","description":"CWE-346: Origin Validation Error","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-15T16:18:26.157Z"},"source":{"advisory":"GHSA-mq6p-m9cc-q432","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-15T16:35:12.169514Z","id":"CVE-2026-52842","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-15T16:35:28.146Z"}}]}}}