Malicious Browser Add

Gbhackers •Mayura Kathir • June 5, 2026

Malicious browser add-ons are actively harvesting conversations and personal data from users of major AI platforms including ChatGPT, Claude, Copilot, Gemini, and DeepSeek. The threat leverages ostensibly helpful Chrome extensions VPNs, sidebars, and “AI assistants” to intercept agentic-AI interactions, exfiltrate chat histories, and aggregate sensitive information that users routinely with generative models. Analysis of […]

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Malicious Browser Add-Ons Exploit AI Platform Users Malicious browser add-ons are targeting users of popular AI platforms such as ChatGPT, Claude, Copilot, Gemini, and DeepSeek. These extensions masquerade as helpful tools but are actually harvesting personal data and chat histories. Millions of users are affected, as these add-ons intercept interactions with generative AI models. The attack method involves leveraging seemingly benign Chrome extensions that operate in the background to exfiltrate sensitive information. The scope of the impact is significant, given the widespread use of these AI platforms daily. Current analysis indicates a growing trend in such malicious activities, raising alarms among cybersecurity experts. Users are advised to be cautious and review their installed extensions for potential threats. 2 sources 68

Extracted Entities

Malicious Browser Add

The full story

Extracted Entities

Attack Types (2)

MITRE ATT&CK (1)

Platforms (2)

Tools (5)