{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.2.9"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2cdaac780bed65db98bbb6ed2ad5bc6011863c76"
            },
            {
              "fixed": "b2b1302fa2638bcc295c6ad0d9a71bf9aa75adb1"
            }
          ],
          "repo": "https://github.com/lightpanda-io/browser",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-36mm-v3c2-24cc"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-346"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52843.json"
  },
  "details": "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.",
  "id": "CVE-2026-52843",
  "modified": "2026-07-17T03:42:05.849153321Z",
  "published": "2026-07-15T16:16:07.762Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/lightpanda-io/browser/releases/tag/0.2.9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52843.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/lightpanda-io/browser/security/advisories/GHSA-36mm-v3c2-24cc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52843"
    },
    {
      "type": "FIX",
      "url": "https://github.com/lightpanda-io/browser/commit/2cdaac780bed65db98bbb6ed2ad5bc6011863c76"
    },
    {
      "type": "FIX",
      "url": "https://github.com/lightpanda-io/browser/pull/2155"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Lightpanda: fetch() and XMLHttpRequest attach session cookies to cross-origin requests regardless of credentials mode"
}