CVE-2026-56766

Hydra · thc-hydra

A security vulnerability has been identified in the thc-hydra authentication cracking tool, affecting all versions up to and including version 9.

Executive summary

A high-severity vulnerability in the thc-hydra security tool could lead to unauthorized system access or compromise if successfully exploited.

Vulnerability

The vulnerability exists within the core functionality of the thc-hydra tool. While technical details are limited, users should assume that improper input handling or memory management could be leveraged by an attacker to execute arbitrary code.

Business impact

With a CVSS score of 8.8, this vulnerability presents a significant risk, particularly because thc-hydra is often used in sensitive security operations. Compromise of this tool could allow attackers to pivot into internal networks or intercept credentials targeted by the application, leading to widespread unauthorized access.

Remediation

Immediate Action: Upgrade to the latest stable release of thc-hydra as specified in the official vendor advisory to mitigate the identified security risks.

Proactive Monitoring: Monitor the execution of security tools within the environment for unexpected behavior or unauthorized modifications to the binary.

Compensating Controls: Restrict access to the thc-hydra utility to authorized security personnel only and ensure it is executed within a hardened, isolated environment.

Exploitation status

Public Exploit Available: false

Analyst recommendation

Security teams should prioritize updating their instances of thc-hydra immediately. Given the tool's nature as an attack utility, maintaining an unpatched version creates a dangerous vector that could be weaponized against your own infrastructure.