CVE-2026-52843

CRITICAL SEVERITY

CVSS Score & Metrics

Base Score

9.3 / 10

Vector String

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

Vulnerability 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.

Vulnerability Details

Published Date

July 15, 2026

Last Modified

July 15, 2026

CWE ID

CWE-346

Source

NVD

Vendor

lightpanda-io

Product

browser

External References

https://github.com/lightpanda-io/browser/commit/2cdaac780bed65db98bbb6ed2ad5bc6011863c76
https://github.com/lightpanda-io/browser/pull/2155
https://github.com/lightpanda-io/browser/releases/tag/0.2.9
https://github.com/lightpanda-io/browser/security/advisories/GHSA-36mm-v3c2-24cc

CVE-2026-52843

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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