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Jul 28

Critical Fastjson Zero-Day CVE-2026-16723 Actively Exploited for Remote Code Execution on Java Servers

A critical zero-day vulnerability tracked as CVE-2026-16723 is being actively exploited in Fastjson 1.x versions ranging from 1.2.68 to 1.2.83. The flaw enables unauthenticated remote code execution on Java servers that process attacker-controlled JSON, particularly when applications run as Spring Boot executable fat JARs. Exploitation succeeds even when AutoType is disabled and does not require elevated privileges or user interaction. No official patch is available for the 1.x branch, forcing organizations to rely on SafeMode activation or migration to fastjson2. Active campaigns have primarily targeted organizations in the United States, with additional activity observed in Singapore and Canada across finance, healthcare, and retail sectors. The vulnerability stems from type resolution logic that allows attackers to bypass restrictions via resource lookups before security controls are applied.

HispasecVulnerabilities & Exploits
Jul 27

GitHub and PyPI Introduce Time-Based Defenses Against Supply Chain Attacks

GitHub and PyPI have activated new time-based barriers to slow down supply chain attacks. Dependabot now waits a default of 72 hours before proposing version updates, while PyPI rejects new files added to releases older than 14 days. The changes target non-security version updates and attempts to poison older stable releases. Security updates remain immediate, and the cooldown can be adjusted via dependabot.yml. The PyPI restriction, effective since July 8 2026, addresses risks from compromised tokens or CI/CD pipelines. Both platforms aim to give the community time to detect malicious packages before widespread adoption.

HispasecSupply Chain & Open Source
Jul 24

Dolphin X Malware Adds AI Profiler to Rank and Prioritize High-Value Victims After Infection

Dolphin X is a newly identified Windows infostealer and remote access trojan that integrates an AI Profiler component designed to score infected machines and generate priority rankings for operators. The profiler analyzes telemetry from compromised systems, including application usage, browser domains visited, and installed software, to produce daily summaries that help attackers focus resources on the most valuable targets such as those with cloud access or sensitive tools. Dolphin X claims compatibility with over 300 applications, explicitly covering nine Chromium and Gecko browser families, more than 100 cryptocurrency wallet extensions, 65 desktop wallets, 10 password managers, and over 30 common cloud CLI tools. The malware targets files like .env configurations, SSH keys, cloud access tokens, browser sessions, and cryptocurrency wallet data to accelerate movement from initial credential theft to further compromises in accounts and production environments. Researchers have confirmed the AI Profiler workflow and associated scoring functions in the operator panel, although the underlying AI model itself remains unverified without full analysis of an active sample. The discovery highlights how automated prioritization can significantly shorten the time between mass infections and targeted follow-on attacks, prompting recommendations for reduced local credential storage and enhanced behavioral detection.

HispasecMalware & Botnets
Jul 23

CVE-2026-8933: snap-confine Flaw Allows Local Root Escalation on Default Ubuntu Desktop Installs

A high-severity vulnerability tracked as CVE-2026-8933 affects snap-confine within snapd and enables unprivileged local users to obtain root access on default installations of Ubuntu Desktop 24.04, 25.10, and 26.04. The flaw stems from a hardening change that replaced traditional setuid root with Linux capabilities, inadvertently creating a race condition during sandbox initialization involving temporary files in /tmp, FUSE mounts, and symbolic links. Attackers can chain the issue with malicious udev rules to bypass AppArmor confinement and force systemd-udevd to execute commands as root. Canonical has released patched versions of snapd including 2.76.1 upstream and corresponding Ubuntu packages for multiple releases, along with ESM updates for older systems. The CVSS score of 7.8 reflects high impact on confidentiality, integrity, and availability once local access is obtained. Organizations are advised to deploy the updates immediately on workstations and developer machines while strengthening local execution controls and AppArmor policies.

HispasecVulnerabilities & Exploits
Jul 22

Critical wp2shell Vulnerability Chain Exploited in WordPress for Unauthenticated Remote Code Execution and Webshell Deployment

A critical vulnerability chain dubbed wp2shell is being actively exploited against WordPress Core installations, enabling unauthenticated remote code execution and the installation of persistent webshells. The flaws affect versions 7.0.x prior to 7.0.2, 6.9.x prior to 6.9.5, and the 6.8 branch before 6.8.6, with patches now available. Attackers chain CVE-2026-63030 and CVE-2026-60137 through the WordPress REST API batch processing endpoint and an SQL injection in WP_Query via the author__not_in parameter. Observed campaigns involve mass scanning, user enumeration, attempts to read wp-config.php, and deployment of PHP webshells in wp-content/cache that return fake 404 responses. Administrators are urged to update immediately, audit logs for anomalous REST API requests, inspect for unauthorized admin accounts or plugins, and rotate credentials if wp-config.php exposure is suspected.

HispasecVulnerabilities & Exploits
Jul 21

FakeGit Campaign Floods GitHub with 7,600 Fake Repositories to Distribute SmartLoader Malware

The FakeGit operation has created or repurposed approximately 7,600 repositories on GitHub to trick users and automated agents into downloading SmartLoader, a loader that installs additional malware including the StealC infostealer. Attackers clone legitimate projects, replicate documentation and developer profiles, and host malicious ZIP files in GitHub Releases that have already accumulated over 14 million downloads across roughly 200 repositories. A notable tactic called AgentBaiting targets AI systems by disguising more than 800 repositories as AI Skills or MCP servers, leading tools from Anthropic, Google, and OpenAI to recommend malicious packages. The infection chain uses LuaJIT to execute obfuscated Lua scripts that deploy SmartLoader, which establishes persistence via scheduled tasks and resolves command-and-control infrastructure through a blockchain dead drop on Polygon. Over 600 listings linked to the campaign have also appeared on public directories such as LobeHub, Glama, and MCP Market, extending the reach beyond GitHub. Defenders are advised to maintain approved catalogs of AI components, apply application control policies, and monitor for LuaJIT execution and anomalous outbound traffic.

HispasecSupply Chain & Open Source
Jul 20

Hugging Face Confirms Production Infrastructure Breach by Autonomous AI Agent via Malicious Dataset

Hugging Face has disclosed a sophisticated intrusion into its production environment that began with a malicious dataset and was executed by an autonomous AI agent. The attacker gained code execution in the dataset processing pipeline through a remote code execution loader and template injection, then escalated privileges and moved laterally across internal clusters over a weekend. Limited internal datasets and service credentials were accessed, but the company found no evidence of tampering with public models, Spaces, container images, or published packages. Forensic analysis processed over 17,000 attacker events using LLM-based agents, and the investigation ultimately relied on an open-weight model after commercial LLMs refused to handle real attack artifacts. Hugging Face responded by closing the initial execution paths, rebuilding compromised nodes, rotating all credentials and tokens, and tightening cluster admission controls. Users are strongly advised to immediately rotate Hugging Face access tokens, audit secrets in CI/CD pipelines and repositories, and apply least-privilege principles.

HispasecAI Security
Jul 18

Eleven Old Microsoft-Signed UEFI Shims Enable Bypass of Secure Boot on Linux Systems Still Trusting Microsoft Corporation UEFI CA 2011

Eleven legacy UEFI shim bootloaders signed by Microsoft, all version 0.9 or earlier, can be abused to bypass UEFI Secure Boot on systems whose firmware still trusts the Microsoft Corporation UEFI CA 2011 certificate. Attackers who manage to place one of these vulnerable shims in the boot path can execute arbitrary code before the operating system loads, enabling bootkits, persistence, and kernel-level compromise with minimal visibility to traditional EDR tools. The issue stems not from a new kernel bug but from the continued validity of old, correctly signed binaries that have not yet been revoked in the DBX database. Microsoft has already issued DBX revocation updates, yet administrators must first upgrade shim, GRUB, and other boot components to modern versions that support SBAT before applying the revocations to avoid bricking systems. Affected implementations include Red Hat Enterprise Linux 7.2, CentOS 7.2, Oracle Linux 7.2, openSUSE, baramundi Management Suite up to 2024R1, WipeDrive 8.0.0–8.1.3, PC Doctor Service Center, and Abitti 1. The problem is tracked under CVE-2026-8863 and CVE-2026-10797, with public references available from The Hacker News, CERT/CC VU#616257, NIST NVD, and Help Net Security.

HispasecVulnerabilities & Exploits
Jul 18

SonicWall Issues Emergency Hotfixes After Detecting Active Exploitation of Two Zero-Day Vulnerabilities in SMA1000 Appliances

SonicWall has confirmed active exploitation of two zero-day vulnerabilities in its SMA1000 series appliances, prompting the immediate release of hotfixes and a strict compliance deadline for U.S. federal agencies. The first flaw, CVE-2026-15409, carries a critical CVSS score of 10.0 and allows unauthenticated server-side request forgery (SSRF) through the Appliance Work Place interface, enabling attackers to force the device to make unauthorized requests to internal services. The second vulnerability, CVE-2026-15410, rated CVSS 7.2, permits authenticated code injection via the Appliance Management Console, allowing administrators to execute operating system commands. Affected models include SMA6210, SMA7210, and SMA8200v running specific vulnerable platform versions such as 12.4.3-03245 through 12.5.0-02800. CISA has added both CVEs to its Known Exploited Vulnerabilities catalog, requiring federal agencies to patch or decommission impacted systems by July 17, 2026. Indicators of compromise and recommended response actions, including log analysis and potential appliance reimaging, have been published to help organizations detect and mitigate potential intrusions.

HispasecVulnerabilities & Exploits