CVE-2026-55835— Lookyloo: Potential sub-system DoS due to parameter missmatch in notification
Quick assessment
Affected
Lookyloo lookyloo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Lookyloo 是一个 Web 界面，允许用户抓取网页并展示相互调用的域名树。在 1.39.4 版本之前，未认证用户可以按需触发 Lookyloo 的“报告抓取结果”邮件功能（此行为本身是预期的）。然而，/json/<uuid>/report API 端点（CaptureReport）错误地传递了 email 和 comment 参数，从而覆盖了 as_admin 标志。当 as_admin 为 True 时，系统会在已配置的 MISP 实例上触发搜索查询，并将匹配到的 URL 列表添加到发送给分析员的邮件中（该
Possible ATT&CK Techniques 2 AI
T1499 · Endpoint Denial of Service T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-55835
Vulnerability Information
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Vulnerability Title
Lookyloo: Potential sub-system DoS due to parameter missmatch in notification
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
参数问题
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-55835
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-55835 (2)
Vendor Advisories for CVE-2026-55835 (1)
Vendor Pages for CVE-2026-55835 (1)
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🔗 Release v1.39.4 · Lookyloo/lookyloo · GitHub x_refsource_MISC
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V. Comments for CVE-2026-55835
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