CVE-2026-52842

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Source
https://cve.org/CVERecord?id=CVE-2026-52842
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52842.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-52842
Aliases
  • GHSA-mq6p-m9cc-q432
Published
2026-07-15T16:18:26.157Z
Modified
2026-07-17T03:47:28.023523042Z
Severity
  • 9.3 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N CVSS Calculator
Summary
Lightpanda:URL parser misidentifies page origin for URLs containing @ in the path - Same-Origin Policy bypass
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-346"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52842.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/lightpanda-io/browser

Affected ranges

Type
GIT
Repo
https://github.com/lightpanda-io/browser
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
0588cc374d4af9687cf6f45a7d52f7af04bbacfb
Fixed
85d84c296ed592a0a924c8dee3426dbf7881b560
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.3.1"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

0.*
0.2.7
0.2.8
0.2.9
0.3.0
Other
alpha
beta
nightly
v0.*
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.2.4
v0.2.5
v0.2.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52842.json"