Medium 6.9Published Oct 23, 2026

CVE-2026-55835Lookyloo: Potential sub-system DoS due to parameter missmatch in notification

Updated under an hour ago (Oct 26, 2026, 6:40 AM ET)

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Every CVE for lookyloo

Exploited in the last 30 days

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.

CVSS: 6.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L
Weakness (CWE): CWE-233
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 23, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

Lookyloo lookyloo lookyloo:lookyloo (from the name)	before 1.39.4	CNA record

References

https://github.com/Lookyloo/lookyloo/security/advisories/GHSA-66gj-hmcp-5cfjx-refsource-confirm
https://github.com/Lookyloo/lookyloo/pull/1330x-refsource-misc
https://github.com/Lookyloo/lookyloo/commit/d5b9a401998cd50b88e5d7425f82baac78d8f082x-refsource-misc
https://github.com/Lookyloo/lookyloo/releases/tag/v1.39.4x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.