PT-2026-60227 · Lightpanda Io · Browsers

Published 2026-07-15 · Updated 2026-07-15 · CVE-2026-52843

NVD

CVSS v3.1

9.3

Critical

Base vector

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

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.

Fix

Origin Validation Error

Weakness Enumeration

CWE-346

Related Identifiers

CVE-2026-52843

Affected Products

Browsers

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-52843 · Security Note
• https://github.com/lightpanda-io/browser/releases/tag/0.2.9 · Note
• https://github.com/lightpanda-io/browser/commit/2cdaac780bed65db98bbb6ed2ad5bc6011863c76 · Note
• https://github.com/lightpanda-io/browser/pull/2155 · Note
• https://github.com/lightpanda-io/browser/security/advisories/GHSA-36mm-v3c2-24cc · Note