CVE-2026-52842
Published:July 15, 2026
Updated:August 04, 2026
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.
Affected Packages
https://github.com/lightpanda-io/browser.git (GITHUB):
Affected version(s) >=0.2.7 <0.3.1Fix Suggestion:
Update to version 0.3.1Related Resources (6)
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Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Origin Validation Error
EPSS
Base Score:
0.16