MEDIUMCVSS v4 6.9Vulnerability

CVE-2026-55835

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.

Properties

Severity
MEDIUM
Nvd fetched at
2026-10-23T06:18:22.414738+00:00
Cvss score
6.9
Cvss severity
MEDIUM
Retrieved at
2026-10-23T06:23:13+00:00
Score
6.9
Last source
NVD
Cvss version
4.0
Cve id
CVE-2026-55835
Cvss vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
First seen by Signal
2026-10-23T06:23:13+00:00
Vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published at
2026-10-23T05:17:15.543
Last modified
2026-10-23T05:17:15.543

Related Entities (1)

HAS_WEAKNESS (1)

→[Weakness]CWE-233

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CVE-2026-55835 (CVSS v4 6.9) — Ninja Signal Threat Intelligence | Ninja Signal