CVE-2026-52843

critical · 9.3

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.

9.3

CVSS

0.2%

EPSS (exploit prob.)

15th

EPSS percentile

2026-07-15

Published

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

Weaknesses

CWE-346

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-52843