Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/Lookyloo/lookyloo/commit/d5b9a401998cd50b88e5d7425f82baac78d8
- https://github.com/Lookyloo/lookyloo/pull/1330
- https://github.com/Lookyloo/lookyloo/releases/tag/v1.39.4
- https://github.com/Lookyloo/lookyloo/security/advisories/GHSA-66gj-hmcp-5cfj
FAQ
What is CVE-2026-55835?
CVE-2026-55835 is a documented vulnerability. 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...
How severe is CVE-2026-55835?
CVSS scoring is not yet available for CVE-2026-55835. Check NVD for updates.
Is there a patch for CVE-2026-55835?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.