CVE-2026-52843

CriticalCVSS 9.3/10Last modified Oct 24, 2026

Description

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.

Metrics

CVSS 3.1 9.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Weakness enumeration

CWE-346

Affected software

Vendor	Product	Versions
lightpanda-io	browser	< 0.2.9

References

Timeline

Published: Jul 15, 2026
Last modified: Oct 24, 2026
NVD status: Deferred

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