Improper Input Validation in Lookyloo Web Interface
CVE-2026-55835

6.9MEDIUM

Key Information:

Vendor

Lookyloo

Status
Lookyloo
Vendor
CVE Published:
23 October 2026

What is CVE-2026-55835?

The Lookyloo web interface, which allows users to capture and navigate a website's domain hierarchy, suffers from an input validation vulnerability. An unauthenticated user can exploit this flaw through the '/json//report' API endpoint (CaptureReport) by manipulating email and comment parameters, inadvertently setting the 'as_admin' flag to True. This can trigger unintended search queries on a connected MISP instance, potentially overwhelming the service with requests and leading to denial-of-service conditions. The issue has been addressed in version 1.39.4.

Affected Version(s)

lookyloo < 1.39.4

References

https://github.com/Lookyloo/lookyloo/security/advisories/...
x_refsource_CONFIRM
https://github.com/Lookyloo/lookyloo/pull/1330
x_refsource_MISC
https://github.com/Lookyloo/lookyloo/commit/d5b9a401998cd...
x_refsource_MISC

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.