AUGUST 16, 2026
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Case File

CVE-2026-71271

HIGH · CVSS 8.5 EPSS 0.24% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-05 · Last synced 2026-08-16

CyberRota Analysis

AI-Generated

The vulnerability affects Memos on Linux systems, where improper validation of webhook URLs allows an attacker to register a malicious URL pointing to 0.0.0.0. This oversight enables the server to make outbound HTTP requests to its own loopback interface, potentially exposing sensitive internal services. Organizations using Memos should prioritize this issue to mitigate the risk of internal service exposure.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-71271
Severity
HIGH
CVSS
8.5
EPSS
0.24%

Original NVD Description

Memos' webhook URL validation, isReservedIP (internal/webhook/validate.go), checks a candidate IP against a reservedCIDRs list that omits 0.0.0.0/8 and never calls ip.IsUnspecified — unlike the correctly implemented sibling function isInternalIP in internal/httpgetter/html_meta.go, which does.