CVE-2026-52843
Lightpanda: fetch() and XMLHttpRequest attach session cookies to cross-origin requests regardless of credentials mode
- State
- Published
- Severity
- 9.3 Critical
- Published
- Jul 15, 2026
- Updated
- Jul 15, 2026
- Reserved
- Jun 8, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.3 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N | GitHub_M |
Weaknesses
- CWE-346 Origin Validation Error
Affected Products
| Product | Versions |
|---|---|
browserlightpanda-io |
|
References
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