Security Newsletter

Daily Security Briefing #298

DjediTech June 27, 2026 3 min read
Daily Security Briefing #298
Table of Contents

June 27, 2026 | Read Online

Cloud bucket hijacking technique exposed, Russian intelligence targets Signal users, and Linux kernel vulnerabilities exploited…


Executive Summary

Critical cloud storage attack techniques have been exposed, allowing attackers to silently redirect active data streams. Meanwhile, Russian intelligence services have targeted Signal users’ backup recovery keys. Additionally, severe Linux kernel vulnerabilities have been uncovered, enabling local attackers to gain root privileges.



Top Articles

Cloud Bucket Hijacking Lets Attackers Silently Exfiltrate AWS, Google Cloud Data A critical cloud storage attack technique that exploits a fundamental architectural vulnerability shared across all major cloud service providers. The technique, dubbed cloud bucket hijacking, allows attackers to silently redirect active data streams, including audit logs and sensitive telemetry, into attacker-controlled storage environments. GBHackers

Ukraine Says Russian Intelligence Used Fake Support Texts to Steal Messaging Credentials The Security Service of Ukraine (SSU) said it, together with the U.S. Federal Bureau of Investigation (FBI), uncovered a long-running campaign orchestrated by Russian intelligence services to break into the messaging accounts of government officials, military personnel, politicians, and activists in Ukraine, Europe, and the U.S. The Hacker News

OpenAI Previews GPT-5.6 Sol With Restricted Access and Stronger Cyber Safeguards OpenAI on Friday released three versions of GPT-5.6, called Sol, Terra, and Luna, as a limited preview to a small number of companies as part of an ongoing engagement with the U.S. government. The Hacker News

Clean GitHub repo tricks AI coding agents into running malware An agentic coding tool tasked with cloning and setting up a seemingly benign GitHub repository could execute a malicious payload that remains invisible to security scanners, AI agents, and human reviewers. BleepingComputer

FBI: Russian hackers now target Signal backup recovery keys The FBI and CISA are warning that a phishing campaign targeting Signal users tied to Russian intelligence services has evolved to steal Signal Backup Recovery Keys, allowing attackers to access victims’ historical messages. BleepingComputer

Third-Party Breaches Teach Education Sector a Costly Lesson in Vendor Risk Rising threats from third-party actors are forcing institutions to play defense to protect student data from ransomware and other attacks. Dark Reading

Chinese Framework Powers 200,000 Scam Sites Threat actors are selling investment scam templates created using the legitimate DCloud Uni-App toolkit. SecurityWeek

Linux Kernel DirtyClone Vulnerability Lets Local Attackers Gain Root Privileges A critical Local Privilege Escalation flaw has been uncovered within the Linux kernel, allowing unprivileged local users to seamlessly gain root access by manipulating the system’s page cache. GBHackers


AI Transparency: This newsletter uses AI to curate, rank, and summarize cybersecurity content from leading industry blogs. All articles link directly to original authors. Executive summaries are AI-generated based on article content. I curate the sources and deliver the digest—the original authors deserve the credit for their excellent work.