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CVE-2026-52843: CWE-346: Origin Validation Error in lightpanda-io browserCVE-2026-52843
0

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.

CriticalVulnerability#cve#cve-2026-52843#cwe-346
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CVE-2026-52842: CWE-346: Origin Validation Error in lightpanda-io browserCVE-2026-52842
0

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.

CriticalVulnerability#cve#cve-2026-52842#cwe-346
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