Critical GitHub RCE Vulnerability CVE-2026-3854 Allows Arbitrary Commands

Executive Summary  On 20 April 2026 Wiz Research uncovered a critical vulnerability (CVE-2026-3854) in GitHub’s internal git infrastructure affecting both GitHub.com and GitHub Enterprise Server. By exploiting an injection flaw in GitHub’s internal protocol, any authenticated user could execute arbitrary commands on GitHub’s backend servers with a single git push command – using nothing but a standard git client.   Affected…

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Linux “Copy Fail” Vulnerability Enables Privilege Escalation Across Distributions

Executive Summary According to a report from Xint published on 29 April 2026, a Linux kernel vulnerability named “Copy Fail” has affected multiple major Linux distributions released since 2017. The flaw, designated CVE-2026-31431, allows a local, unprivileged user to escalate privileges to root by exploiting improper handling of data copying within the kernel. The vulnerability enables potential threat actors…

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Bitwarden CLI Compromised in Broader Checkmarx Supply Chain Campaign

Executive Summary Security researchers from Socket have discovered that version 2026.4.0 of Bitwarden CLI has been compromised through a poisoned GitHub Actions workflow. This incident is part of the broader Checkmarx supply chain campaign and specifically impacts the npm distribution used by developers and automated build environments. The malicious payload executes credential-harvesting routines targeting cloud service providers, SSH…

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Extortion in the Enterprise: Defending Against BlackFile Attacks

Executive Summary Unit 42 has responded to numerous incidents since February 2026 involving data theft and extortion across various industries. We attribute a specific portion of this financially-motivated activity with moderate confidence to the activity cluster CL-CRI-1116, which overlaps with public reporting on BlackFile, UNC6671 and Cordial Spider.  This blog is designed to provide RH-ISAC…

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New NGate Variant in Trojanized NFC Payment App

Executive Summary ESET Researchers discovered a new variant of the NGate malware family that abuses a legitimate Android application called HandyPay, instead of the previously leveraged NFCGate tool. The malicious code allows attackers to transfer NFC data from the victim’s payment card to their own device and use it for contactless ATM cash-outs and unauthorized payments, while also capturing the victim’s payment…

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The Missing Security Layer in Agentic AI in Retail

A New Class of Digital Operator Retail organizations are moving quickly to operationalize agentic AI to streamline customer service, create self-serve customer workflows, enable shopping bots, and improve internal employee productivity. This is not just an internal transformation. Your customers will use agents to browse, compare, and buy. Your employees will create their own “mini…

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Vercel Discloses Unauthorized Access to Internal Systems; ShinyHunters Claims Responsibility

Executive Summary Infrastructure provider Vercel disclosed a significant security incident, stemming from a compromise of the third-party AI tool Context[.]ai. A highly sophisticated threat actor leveraged a hijacked OAuth token from a Vercel employee to gain unauthorized access to internal environments and non-sensitive environment variables. ShinyHunters has claimed responsibility for the breach, allegedly offering the exfiltrated data for sale…

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Where Retail and Hospitality Fraud is Actually Happening Now (and What to Do About It)

For years, fraud has been a payments problem. Detect it at checkout. Measure success in chargebacks avoided. Build controls around transactions. That model made sense when fraud itself was transactional – and reactive. That era is over. Modern fraud operations are not waiting for a payment event. They are active earlier in the customer journey,…

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BlueHammer Windows Local Privilege Escalation Zero-Day Publicly Released

Executive Summary On 3 April 2026, a disgruntled security researcher publicly released a working proof-of-concept for an unpatched Windows local privilege escalation (LPE) vulnerability named BlueHammer. The flaw combines a time-of-check to time-of-use (TOCTOU) race condition and path-confusion issue in Windows Defender’s signature-update mechanism. It allows a low-privileged local user to access the SAM database,…

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Active Data Theft Campaign Targeting Snowflake Customers via Anodot Third-Party SaaS Integration Breach

Executive Summary On 7 April 2026, reports emerged in open source that multiple companies have suffered data theft attacks after a SaaS integration provider was breached and authentication tokens stolen. While numerous cloud storage and SaaS vendors were targeted using the stolen tokens, the majority of the data theft attacks targeted the cloud-based data warehouse platform Snowflake….

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