SEPTEMBER 20, 2026
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Case File

CVE-2026-53500

HIGH · CVSS 8.2 EPSS 0.29% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-31 · Last synced 2026-08-30

CyberRota Analysis

AI-Generated

The vulnerability in Thumbor allows for improper validation of hostnames in the ALLOWED_SOURCES configuration, enabling attackers to bypass security controls by exploiting unescaped dots in the matching process. This could lead to unauthorized access to sensitive resources or data. Organizations using versions prior to 7.8.0 should prioritize upgrading to mitigate potential security risks.

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-2026-53500
Severity
HIGH
CVSS
8.2
EPSS
0.29%

Original NVD Description

Thumbor is an open-source photo thumbnail service by globo.com. Prior to 7.8.0, the ALLOWED_SOURCES configuration passes plain strings to re.match() without escaping dots, so a hostname differing at dot positions can match the allowlist. This issue is fixed in 7.8.0.