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Medium · 6.9 CVE-2026-55835 EUVD-2026-108582

Lookyloo: Potential sub-system DoS due to parameter missmatch in notification

Published Oct 23, 2026 · Updated Oct 23, 2026 · Assigned by GitHub_M

Description

Lookyloo is a web interface that allows users to capture a website page and then display a tree of domains that call each other. Prior to version 1.39.4, an unauthenticated user can trigger Lookyloo's "report a capture" email on demand (this is expected). The /json/<uuid>/report API endpoint (CaptureReport) is incorrectly passing the email and comment parameters, overwriting as_admin. When True, as_admin will trigger a search query on a MISP instance (if configured) and add a list of matching URLs in the email sent to the analyst (not the submitter, so there is no risk of leaking information) . It could potentially cause a DoS on the MISP instance. This issue has been patched in version 1.39.4.

Affected products

VendorProductAffectedFixed
Lookyloo lookyloo < 1.39.4 —

References