overflow Archives

Tech Optimizer

June 6, 2026

PostgreSQL Dump and Restore: The Complete pg_dump Guide

pg_dump is a utility for exporting a PostgreSQL database into a file, which can be restored on the same or different servers. It exports a single database's tables, views, sequences, functions, indexes, triggers, and in-database grants but does not include roles, tablespaces, or server-level configurations. To capture global objects, pg_dumpall --globals-only should be executed prior to the per-database dump. pg_dump requires CONNECT and SELECT privileges on all tables and sequences within the target database, and a dedicated backup role is sufficient for single-database dumps, while superuser access is needed for global objects. pg_dump supports various output formats: plain SQL (.sql), custom binary (.dump), directory of files, and tar archive (.tar), each with different capabilities for restoration and compression. The custom format allows for selective and parallel restoration. For non-interactive use, credentials can be stored in a .pgpass file or passed via the PGPASSWORD environment variable. Restoration methods depend on the dump format: psql is used for plain SQL files, while pg_restore is used for custom and directory formats. The restoration process requires the target database to be created beforehand. Version mismatches between pg_dump and pg_restore can lead to failures, so it's essential to ensure that the binaries are version-matched. In Docker, pg_dump and pg_restore can be executed within containers, but care must be taken to manage credentials and ensure version compatibility. Exit codes from pg_dump should be checked to confirm successful operations.

Tech Optimizer

June 6, 2026

Azure HorizonDB Enters Public Preview: Web IQ Already Powers Copilot and ChatGPT

Microsoft announced the public preview of Azure HorizonDB, a fully managed PostgreSQL-compatible database designed for agentic AI workloads, during Microsoft Build 2026 in San Francisco. HorizonDB features a "database-as-logs" architecture, allowing for sub-millisecond multi-zone commit latency and independent scaling of compute and storage. It incorporates a Rust-based storage engine, native DiskANN vector search, and in-database AI model invocation. Additionally, Microsoft launched Web IQ, a web-grounding API layer integrated into Microsoft Copilot and OpenAI's ChatGPT, which provides passage-level structured evidence objects rather than full documents. Web IQ is model-agnostic and aims to enhance information density and reduce costs. Both services are currently in limited availability, with HorizonDB open for preview signups across five Azure regions.

Tech Optimizer

June 6, 2026

PostgreSQL vs SQL Server 2026: $0 vs $15K License

PostgreSQL has become the most utilized database for developers for two consecutive years as of 2026, while SQL Server has introduced native AI capabilities and vector search functionalities in its latest release. PostgreSQL is favored for new projects due to its permissive licensing, cross-platform operation, and extensive ecosystem of extensions, whereas SQL Server is preferred by organizations already using Microsoft products for its robust tooling and enterprise support. As of June 2026, SQL Server ranks third in the DB-Engines popularity ranking with a score of 698, while PostgreSQL ranks fourth with a score of 688. Developer adoption trends show that 49% of respondents in the Stack Overflow 2024 Developer Survey use PostgreSQL, compared to 27% for SQL Server. The latest stable version of PostgreSQL is 18.4, released on May 14, 2026, while SQL Server 2025 (version 17.x) became generally available on November 18, 2025. PostgreSQL is free under a permissive license, while SQL Server's Enterprise Edition can cost upwards of ,123 per two-core pack, with an eight-core minimum. PostgreSQL supports various operating systems, including Linux, Windows, macOS, and BSD, while SQL Server operates on Windows and Linux. PostgreSQL uses PL/pgSQL as its primary procedural language, allowing for multiple procedural languages, whereas SQL Server uses T-SQL. PostgreSQL's JSONB type offers rich indexing, while SQL Server added native JSON support in its 2025 release. Both databases are capable of handling high transaction volumes, but PostgreSQL excels in read-heavy scenarios due to its multi-version concurrency control, while SQL Server's columnstore indexes provide advantages for analytical workloads. PostgreSQL supports tables up to 32 TB, while SQL Server can handle a maximum database size of 524 PB. SQL Server's high availability technology includes Always On Availability Groups, while PostgreSQL offers built-in streaming and logical replication. The security features of both databases meet enterprise standards, with PostgreSQL providing a transparent patching process and SQL Server integrating with Microsoft tools. Real-world usage examples include Stack Overflow using SQL Server, while Instagram and Reddit utilize PostgreSQL. Developer sentiment increasingly favors PostgreSQL for new projects, emphasizing flexibility and open-source solutions. For new startups or greenfield projects, PostgreSQL is recommended due to its zero license cost and compatibility. Existing Microsoft enterprises are advised to stick with SQL Server for its integration benefits. Migration from SQL Server to PostgreSQL is becoming common, with a structured approach required for successful transitions.

Winsage

June 3, 2026

Microsoft Brings AI Agents Directly Into the Windows Terminal

Microsoft has released Intelligent Terminal 0.1, an open-source variant of Windows Terminal that includes native agent functionality. It can be installed via the Microsoft Store or WinGet and operates alongside the existing Windows Terminal. Intelligent Terminal allows users to troubleshoot issues directly within the terminal by interacting with an AI agent that understands the terminal context. The tool features a persistent agent pane for seamless interaction, with GitHub Copilot CLI as the default agent, though it supports any ACP-compatible agent. Automatic error detection is included, providing users with relevant error context and potential fixes. An agent management panel helps users oversee multiple agents and their statuses. The Command Palette has been updated to facilitate agent interactions without disrupting the workflow. Microsoft plans to evolve Intelligent Terminal based on community feedback, with its GitHub repository open for contributions. The release also marks the phasing out of Terminal Chat in Windows Terminal Canary, while the mainline Windows Terminal remains unchanged.

Winsage

June 1, 2026

Windows Server vulnerability can grant system privileges with just a malformed packet — domain controllers are being exploited in the wild

Microsoft is facing scrutiny due to a critical remote execution vulnerability, CVE-2026-41089, rated at 9.8, affecting Windows Server domain controllers from version 2012 onward. This vulnerability allows unauthenticated users on the same network to send malformed UDP packets to a domain controller, potentially granting unauthorized system access or causing a reboot, leading to denial-of-service scenarios. The vulnerable service is Netlogon, and there are no immediate mitigations available; patches will be released on May 12. The vulnerability could allow attackers to create multiple accounts with various access levels, compromising the security of entire networks. Cybersecurity experts recommend patching all linked domain controllers simultaneously. The vulnerability is caused by a buffer overflow in the Netlogon service due to a field in a network packet exceeding its expected size. A GitHub repository exists with proof-of-concept code that can crash the LSASS service. Additionally, Microsoft is in conflict with security researcher Chaotic Eclipse, who has published zero-day exploits following a breakdown in negotiations.

Winsage

June 1, 2026

Critical Windows Netlogon RCE flaw now exploited in attacks

The Centre for Cybersecurity Belgium (CCB) has warned about the exploitation of a critical vulnerability in Windows Netlogon, identified as CVE-2026-41089, which allows remote code execution on domain controllers without prior access or authentication. This vulnerability, characterized as a stack-based buffer overflow, was patched by Microsoft during the May 2026 Patch Tuesday. The CCB emphasized the urgency of patching vulnerable servers, noting that the vulnerability is actively being exploited. The CVSS score for this vulnerability is 9.8. Further details on the ongoing attacks have not been disclosed, and Microsoft has not updated its advisory on the vulnerability.

Winsage

May 27, 2026

When Microsoft was developing Windows 95, developers discovered that SimCity had a severe memory bug that caused it to crash on the new operating system—but instead of forcing the game studio to fix it, Microsoft engineers actually rewrote the core Windows 95 source code to detect if SimCity was running and safely allocate memory for it.

Windows 95 contains a block of code that checks if the user is playing SimCity and adjusts memory management to address a bug from the game's programming. This bug, a "use-after-free" error introduced by SimCity's developer Jon Ross, went unnoticed in Windows 3.x but caused crashes in Windows 95 due to its different memory management. Instead of asking Maxis to fix the bug, Microsoft engineers modified Windows 95 to mimic the older memory behavior, ensuring SimCity would run smoothly. This approach reflects Microsoft's broader strategy of maintaining compatibility with older software through various "shims," allowing legacy programs to function on modern systems.

Tech Optimizer

May 21, 2026

PostgreSQL Flaws Expose Databases to Remote Code Execution and SQL Injection

PostgreSQL has released versions 18.4, 17.10, 16.14, 15.18, and 14.23 to address 11 security vulnerabilities and over 60 bugs. The vulnerabilities affect PostgreSQL versions 14 through 18 and include issues such as remote code execution, SQL injection, and denial-of-service risks. Specific vulnerabilities include: - CVE-2026-6472: Missing authorization in CREATE TYPE allows query hijacking. - CVE-2026-6473: Integer wraparound leads to out-of-bounds writes and server crashes. - CVE-2026-6474: Format string issue leaks server memory. - CVE-2026-6475: Symlink attack allows overwriting arbitrary files. - CVE-2026-6476: SQL injection allows execution of arbitrary SQL as superuser. - CVE-2026-6477: Memory buffer overwrite via libpq lo_* functions. - CVE-2026-6478: Timing attack exposes MD5-hashed passwords. - CVE-2026-6479: SSL/GSS recursion flaw allows denial-of-service. - CVE-2026-6575: Buffer over-read leaks memory data (PostgreSQL 18 only). - CVE-2026-6637: Refint module enables stack overflow and SQL injection, leading to possible RCE. - CVE-2026-6638: SQL injection in REFRESH PUBLICATION via table names. Organizations are advised to upgrade to the latest versions, avoid MD5 password authentication, restrict privileges, audit extensions, and monitor for abnormal activity. PostgreSQL 14 will reach its end-of-life on November 12, 2026.

Tech Optimizer

May 20, 2026

Critical PostgreSQL Flaws Enable Code Execution and SQL Injection

On May 14, 2026, PostgreSQL released critical security updates for versions 18.4, 17.10, 16.14, 15.18, and 14.23, addressing 11 Common Vulnerabilities and Exposures (CVEs) related to stack buffer overflows, SQL injection, memory disclosure, and denial-of-service vulnerabilities. The most critical vulnerability, CVE-2026-6637, has a CVSS score of 8.8 and allows remote, unprivileged database users to execute arbitrary code. Other notable vulnerabilities include CVE-2026-6473, which affects memory allocation leading to potential memory corruption, and CVE-2026-6475, which allows overwriting sensitive OS-level files. Additional vulnerabilities include SQL injection flaws and authentication issues, with various CVSS scores ranging from 3.7 to 7.5. The updates can be implemented without a database dump, and PostgreSQL 14 will reach its end-of-life on November 12, 2026.

Tech Optimizer

May 20, 2026

PoC Exploit Released for 20-Year Old PostgreSQL RCE Vulnerability

A proof-of-concept exploit has been developed for CVE-2026-2005, a remote code execution vulnerability in the pgcrypto extension of PostgreSQL. This vulnerability, stemming from legacy code, allows attackers to trigger a heap-based buffer overflow through specially crafted PGP messages, enabling arbitrary memory read and write operations. Successful exploitation can escalate privileges to PostgreSQL superuser status and execute commands on the operating system. The exploit targets PostgreSQL instances compiled from a specific vulnerable commit and circumvents protections like Address Space Layout Randomization (ASLR). It involves corrupting heap memory structures, leading to a controlled pointer leak that reveals the heap layout. Security researcher Varik Matevosyan has published the PoC on GitHub, demonstrating the exploitation process. The exploit requires a compatible PostgreSQL binary and utilizes Python-based tools for interaction. Organizations are advised to review their PostgreSQL deployments, disable unnecessary extensions, and apply security updates to mitigate risks.