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CVE-2026-73405— Authorization Bypass in SSE Pub/Sub Allows Unconfirmed Accounts to Access Stream Events in vulnerability-lookup

Quick assessment

Affected
vulnerability-lookup vulnerability-lookup
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.

Vulnerability-Lookup是Vulnerability-Lookup团队开源的一个漏洞查询与扫描工具。 Vulnerability-Lookup 5.5.1及之前版本存在授权问题漏洞，该漏洞源于REST API和SSE流接口之间授权执行不一致，仅通过X-API-KEY匹配进行身份验证而未验证账户激活和确认状态，导致未激活或未确认账户可通过/pubsub/subscribe/<topic>端点订阅服务器发送事件流，可能暴露新提交或未审核的评论等数据。

CVSS 5.3 · Medium EPSS 0.29% · P21

Affected Version Matrix 1

VendorProduct Version RangeStatus
vulnerability-lookup vulnerability-lookup ≤ 5.5.1 affected
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I. Basic Information for CVE-2026-73405

Vulnerability Information
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Vulnerability Title
Authorization Bypass in SSE Pub/Sub Allows Unconfirmed Accounts to Access Stream Events in vulnerability-lookup
Source: CVE Program / CVE List V5
Vulnerability Description
An authorization bypass vulnerability in Vulnerability-Lookup allowed inactive or unconfirmed accounts to subscribe to Server-Sent Events (SSE) streams through the /pubsub/subscribe/<topic> endpoint. The token_required decorator used by the Pub/Sub interface authenticated requests solely by matching the X-API-KEY header against an existing user API key. Unlike the REST API authentication mechanism, it did not verify the account's is_active and is_confirmed state. Because the self-registration process issues an API key before account confirmation is completed, an attacker could create an account and immediately use the resulting API key to access Pub/Sub topics that should only be available to active, confirmed users. This could expose stream events that would otherwise be inaccessible through the REST API, including newly submitted or not-yet-moderated data such as comments. The vulnerability results from inconsistent authorization enforcement between the REST API and the SSE streaming interface. The patch corrects the issue by requiring accounts to be both active and confirmed before permitting access to Pub/Sub streams, bringing the SSE authorization boundary in line with the REST API.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Vulnerability-Lookup 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Vulnerability-Lookup是Vulnerability-Lookup团队开源的一个漏洞查询与扫描工具。 Vulnerability-Lookup 5.5.1及之前版本存在授权问题漏洞，该漏洞源于REST API和SSE流接口之间授权执行不一致，仅通过X-API-KEY匹配进行身份验证而未验证账户激活和确认状态，导致未激活或未确认账户可通过/pubsub/subscribe/<topic>端点订阅服务器发送事件流，可能暴露新提交或未审核的评论等数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
vulnerability-lookup vulnerability-lookup 0 ~ 5.5.1 -

II. Public POCs for CVE-2026-73405

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III. Intelligence Information for CVE-2026-73405

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Patches & Fixes for CVE-2026-73405 (1)

Same Patch Batch · vulnerability-lookup · 2026-08-12 · 4 CVEs total

CVE-2026-73431 8.8 HIGH Reusable Account Activation and Recovery Tokens Allow Repeated Account Takeover in vulnera
CVE-2026-73374 6.1 MEDIUM Stored Cross-Site Scripting (XSS) via Unescaped CNA Reference Tags in vulnerability-lookup
CVE-2026-73432 5.1 MEDIUM Stored Server-Side Request Forgery in Remote-Instance Synchronization Allows Access to Int

IV. Related Vulnerabilities

Same product: vulnerability-lookup
Same vendor: vulnerability-lookup
Same weakness: CWE-862

V. Comments for CVE-2026-73405

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