HashJack Indirect Prompt Injection Weaponizes Websites

Infosecurity Magazine

November 26, 2025 at 10:15 AM

Overview

The newly identified vulnerability known as 'HashJack' poses a significant threat by allowing attackers to compromise websites that interact with AI browsers. This could lead to malicious exploitation, affecting user security and trust in web applications.

Key Takeaways

Affected Systems: Websites that utilize AI browsers
Action Required: Implement security measures to validate and sanitize user inputs, and monitor for unusual activity on websites interacting with AI systems.
Timeline: Newly disclosed

Original Article Summary

A new vulnerability dubbed “HashJack” could enable attackers to booby trap websites when they interact with AI browsers

Impact

Websites that utilize AI browsers

Exploitation Status

The exploitation status is currently unknown. Monitor vendor advisories and security bulletins for updates.

Timeline

Newly disclosed

Remediation

Implement security measures to validate and sanitize user inputs, and monitor for unusual activity on websites interacting with AI systems.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Vulnerability.

Read Original Article

Related Coverage

Trump’s cyber chief pick tells lawmakers he’ll assess efficacy of Cybercom-NSA dual-hat role, if confirmed

CyberScoop

In a recent hearing, President Trump's nominee for the position of cybersecurity chief, Rudd, discussed his plans to evaluate the effectiveness of the dual role held by Cyber Command and the National Security Agency (NSA). If confirmed, Rudd aims to provide an objective assessment of how this dual-hat structure impacts cybersecurity operations and national defense strategies. He acknowledged that this topic has been a point of discussion and will continue to be relevant. Rudd's insights could influence future policies regarding cybersecurity governance and operational efficiency within these critical agencies. This assessment is particularly timely given the increasing complexity of cyber threats facing the U.S.

Jan 15, 2026

Grubhub confirms hackers stole data in recent security breach

BleepingComputer

Grubhub has confirmed that it recently experienced a data breach, allowing hackers access to its systems. According to reports, the attackers are now demanding a ransom, which adds a layer of urgency to the situation. The breach affects customer data, although specific details about what information was accessed have not been disclosed. This incident raises concerns about the security measures in place at Grubhub and the potential risk to users' personal information. As food delivery services become increasingly popular, breaches like this can undermine customer trust and highlight the need for better cybersecurity practices across the industry.

Jan 15, 2026

Predator Spyware Sample Indicates 'Vendor-Controlled' C2

darkreading

Researchers have uncovered how Intellexa, the company behind the Predator spyware, adapts its tactics based on failed deployments and unsuccessful attacks. By analyzing these setbacks, Intellexa aims to refine its commercial spyware, making future operations more effective. This raises concerns for privacy advocates and targets who may be vulnerable to such sophisticated surveillance tools. The findings suggest that Predator could be continuously evolving, increasing the risk for individuals and organizations that may be targeted. As spyware technology becomes more advanced, the implications for personal and national security are significant.

Jan 15, 2026

A ransomware attack disrupted operations at South Korean conglomerate Kyowon

Security Affairs

Kyowon Group, a major South Korean conglomerate, has confirmed that it was hit by a ransomware attack that significantly disrupted its operations. This incident may have also compromised customer data, raising concerns about the safety of personal information for millions of users across its various subsidiaries. Kyowon is involved in diverse sectors including education, publishing, media, and technology, making the potential impact of this breach far-reaching. The company is currently working to assess the damage and restore its systems, but the attack underscores the vulnerabilities that large organizations face in today’s digital landscape. This incident serves as a reminder for companies to bolster their cybersecurity measures to protect sensitive data from similar attacks.

Jan 15, 2026

Max Messenger data breach claimed by hacker on DarkForums

SCM feed for Latest

A hacker has claimed responsibility for a significant data breach involving Max Messenger, reportedly extracting 142 GB of compressed data that includes around 15.4 million user records. The exposed information consists of full names, usernames, and phone numbers, which could put many users at risk of identity theft or spam. This incident raises concerns about the security measures in place to protect user data, especially given the large volume of personal information compromised. Users of Max Messenger should be vigilant about potential phishing attempts and consider changing their passwords to enhance their security. The situation also serves as a reminder for companies to prioritize data protection and implement stronger safeguards against unauthorized access.

Jan 15, 2026

New StackWarp Attack Threatens Confidential VMs on AMD Processors

SecurityWeek

Researchers have revealed a new vulnerability dubbed the StackWarp Attack that targets AMD processors, enabling attackers to execute code remotely within confidential virtual machines (VMs). This flaw poses a significant risk to cloud environments where sensitive data is processed, as it could allow unauthorized access to protected information. The attack exploits weaknesses in the architecture of AMD processors, making it particularly concerning for organizations relying on these systems for secure operations. Companies using AMD processors in their cloud infrastructure should assess their systems for vulnerabilities and stay informed about potential patches or mitigations that may be issued in response to this discovery. The implications of this attack are serious, especially for sectors dealing with confidential data such as finance, healthcare, and government.

Jan 15, 2026