---
title: "Cybersecurity"
description: "Cybersecurity stories from the Sonomos Newsroom. Breaches, vulnerabilities and the security practices that decide whether sensitive data stays put."
url: "https://sonomos.ai/newsroom/topic/cybersecurity/"
source: "https://sonomos.ai/newsroom/topic/cybersecurity/"
---

[Sonomos Newsroom](https://sonomos.ai/newsroom/)

# Cybersecurity

Breaches, vulnerabilities and the security practices that decide whether sensitive data stays put.

3 stories

CybersecurityAnalysis

## [Chainalysis breach by 'agentic' attacker widens: all users' password hashes and live tokens exposed](https://sonomos.ai/newsroom/chainalysis-breach-offensive-agentic-techniques-user-data-exposed/)

Chainalysis disclosed on October 30 that an outside actor using 'offensive agentic techniques' reached internal systems. By November 4 the company said names, usernames, password hashes and live tokens for all users had been exposed.

Nov 7, 20264 min read

- CybersecurityAnalysis

  ## [Check Point: a ChatGPT HTML-preview sandbox flaw let attackers bypass Lockdown Mode and copy chat history](https://sonomos.ai/newsroom/chatgpt-lockdown-mode-bypass-html-preview-popup-check-point/)

  Check Point Research says a popup flaw in ChatGPT's HTML preview let an attacker bypass Lockdown Mode and silently send chat history to an external server. OpenAI fixed it on September 18, 2026.

  Nov 6, 20263 min read
- Cybersecurity

  ## [Sourcenext says misuse of a member API may have exposed 22.5 million records](https://sonomos.ai/newsroom/sourcenext-member-api-misuse-22-million-records/)

  Japanese software seller Sourcenext says a third party misused its member-information API for about four days, and that 22,519,960 records may have leaked, including emails and passwords.

  Oct 19, 20262 min read

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