CVEvulnerability
CVE-2026-52842
9.3 CRITICAL
Official page ↗
- Status
- Deferred
- Published
- 2026-07-15
- Last modified
- 2026-10-24
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 9.3 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- Weaknesses
- CWE-346
Description
Lightpanda is a headless browser designed for AI and automation. Prior to 0.3.1, Lightpanda searched for @ across the entire URL string instead of only the authority component when computing a page origin, so a URL such as `http://attacker.com/@victim.com/` was fetched from attacker.com but treated as `http://victim.com`, allowing a complete Same-Origin Policy bypass. This issue is fixed in version 0.3.1.
Related
Weakness · CWE (1)
- CWE-346 Origin Validation Error weakness
References
- https://github.com/lightpanda-io/browser/commit/0588cc374d4af9687cf6f45a7d52f7af04bbacfb github.com
- https://github.com/lightpanda-io/browser/pull/1998 github.com
- https://github.com/lightpanda-io/browser/releases/tag/0.3.1 github.com
- https://github.com/lightpanda-io/browser/security/advisories/GHSA-mq6p-m9cc-q432 github.com