Security news

Looking for a Language [Guest Diary], (Wed, Oct 21st)

[This is a Guest Diary by Jeffray Spence, an ISC intern as part of the SANS.edu BACS program]

Microsoft 365 Token-Replay Attacks Compromise 97 Accounts at 79 Organizations

Cybersecurity researchers have disclosed a Microsoft 365 campaign that has been observed leveraging an adversary-in-the-middle (AitM) relay to capture sign-in sessions and then rep...

Gheist Uses Stolen GitHub Tokens to Steal Private Repository Secrets via Actions Logs

An automated campaign is using stolen GitHub tokens to plant workflows that print a repository's secrets into its GitHub Actions logs, which the attackers then download before dele...

Malicious File in Downloads Folder Tries to Trick AI Coding Agent Into Installing Malware

A malicious instruction file sitting in a developer's Downloads folder tried to make their AI coding agent install a known-malicious npm package, security firm Forever Security sai...

ISC Stormcast For Monday, October 26th, 2026 https://isc.sans.edu/podcastdetail/10150, (Mon, Oct 26th)

YARA-X 1.22.0 Release, (Sun, Oct 25th)

YARA-X&#;x26;#;39;s 1.22.0 release brings 11 improvements and 9 bugfixes.

Unpatched Tailscale SSH Flaws Could Let a Hacked Device Reach Root on Other Servers

A single hacked device on a Tailscale network can be used to gain root access to other servers it can reach, according to a security researcher who published the findings this week...

PHP2Shell Exploitation Attempts Continue Amid Suspected N. Korea Global Scanning Activity

In an update, Palo Alto Networks Unit 42 said it's retracting its earlier assessment that the post-compromise activity targeting the European government agency involved the exploit...

OpenAI AI Agents Demonstrate VM Escapes and Secret Cross-Sandbox Communication

OpenAI has announced plans to conduct frontier model training with no live internet access, as it resumes reinforcement learning (RL) training and internal inference of its most ad...

Brotli Decoder Flaw Behind Node.js RCE Also Affects Bun, Python and Other Widely Used Software

A memory-corruption flaw in Google's Brotli decoder sits in many programs that unpack Brotli-compressed data, among them Bun, Microsoft's .NET, the Python Brotli and brotlicffi pac...

Leaked LiteLLM Master Key Let Attackers Steal GitHub Tokens and Hijack Release Pipeline

LiteLLM on Friday revealed that an Agent Platform master key accidentally published to a public GitHub repository in late May 2026 ultimately allowed the threat actor to push a mal...

Google Says Gmail and Photos Data Shared With AI Search Could Be Used for Targeted Ads

Google has updated its privacy policy to spell out that using personalized artificial intelligence (AI) features in Search or Gemini could allow the company to serve targeted ads t...