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Ubuntu Security Notices

USN-8952-2: Tornado regression

USN-8952-1 fixed vulnerabilities in Tornado. Unfortunately that update was incomplete due to an incomplete fix for CVE-2026-103263, which broke static file serving for applications that subclass Tornado's StaticFileHandler, such as Jupyter, and could introduce a regression. This update fixes the problem. We apologize for the inconvenience. Original advisory details: It was discovered that Tornado did not properly han…

Vulnerabilities & Zero-Day Botnet & DDoS
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AWS Security Bulletins

CVE-2026-122193 - Issue with Trusted Remote Execution Setup Guide - OS command injection in the example SSM documents in Trusted Remote Execution (REX)

Bulletin ID: 2026-173-AWS Publication Date: 11/06/2026 09:00 AM PST Description: We identified CVE-2026-122193, an OS command injection issue in an example provided in the set-up documentation. The example included a script that creates AWS Systems Manager (SSM) documents (Rex-RO and Rex-RW) for running scripts on managed instances. Due to how the example script handled input parameters, a user with permissions to in…

Vulnerabilities & Zero-Day Cloud Computing Operating Systems
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The Hacker News

Hackers Target OpenSSH SSHole Flaw Within Hours of Disclosure, Gain Root on Honeypot

Threat actors are attempting to exploit a recently disclosed security flaw impacting OpenSSH that can enable sign-ins to accounts that have no password set, according to Previdian. The vulnerability, tracked as CVE-2026-123158 (CVSS score: 8.1) and codenamed SSHole (or *sshole), impacts Linux systems that run OpenSSH on the musl C library with Pluggable Authentication Modules (PAM) disabled,

Vulnerabilities & Zero-Day Operating Systems Identity & Access Security
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