This story was originally published on HackerNoon at: https://hackernoon.com/deepseek-v4-fable-a-security-focused-ai-agent-for-ctfs.
DeepSeek-v4-Fable is a specialized AI agent for authorized security research, CTF solving, and sandboxed exploit planning.
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This story was written by: @aimodels44. Learn more about this writer by checking @aimodels44's about page, and for more stories, please visit hackernoon.com.

DeepSeek-v4-Fable is a specialized AI agent for authorized security research, CTF solving, and sandboxed exploit planning.

This story was originally published on HackerNoon at: https://hackernoon.com/every-ai-agent-is-a-non-human-identity-that-needs-governance.
AI agents create new security identities. Learn why identity lifecycle management, not prompt engineering, is the foundation of secure agentic AI.
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This story was written by: @bhaskarsecuresai. Learn more about this writer by checking @bhaskarsecuresai's about page, and for more stories, please visit hackernoon.com.

The article argues that the biggest security challenge in agentic AI isn't prompt injection but identity management. By treating AI agents as first-class security principals with scoped, short-lived credentials, proper lifecycle management, and auditable delegation, organizations can apply proven identity engineering practices to reduce AI risk.

This story was originally published on HackerNoon at: https://hackernoon.com/anthropics-mythos-identifies-vulnerabilities-in-highly-sensitive-us-government-systems.
Anthropic's Mythos AI exposed U.S. government cyber vulnerabilities, highlighting a debate over controlling advanced AI access as a national security issue.
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This story was written by: @ttassos. Learn more about this writer by checking @ttassos's about page, and for more stories, please visit hackernoon.com.

Anthropic's Mythos AI exposed U.S. government cyber vulnerabilities, highlighting a debate over controlling advanced AI access as a national security issue.

This story was originally published on HackerNoon at: https://hackernoon.com/how-bhargava-reddy-maddireddy-bridges-cybersecurity-research-and-enterprise-security.
Meet cybersecurity researcher Bhargava Reddy Maddireddy and explore his work spanning AI, peer review, and enterprise cyber defense.
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This story was written by: @nicafurs. Learn more about this writer by checking @nicafurs's about page, and for more stories, please visit hackernoon.com.

This profile explores Bhargava Reddy Maddireddy's contributions to cybersecurity through research, peer review, editorial leadership, and enterprise security, highlighting how academic work can influence practical cyber defense.

This story was originally published on HackerNoon at: https://hackernoon.com/how-to-secure-a-self-hosted-cicd-runner-on-a-vps-without-turning-it-into-a-backdoor.
Learn how to secure a self-hosted CI/CD runner on a VPS: harden Linux, isolate jobs, protect secrets, limit Docker risks, and monitor resources.
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This story was written by: @bluevps. Learn more about this writer by checking @bluevps's about page, and for more stories, please visit hackernoon.com.

A self-hosted CI/CD runner on a VPS should be treated like part of your production delivery chain, not just a build machine. Before using it, harden the server, disable risky SSH access, limit inbound traffic, isolate runners by trust level, keep secrets out of the VPS, avoid giving Docker jobs excessive privileges, monitor disk/CPU/memory, plan Docker cleanup, and document recovery steps. The core rule is simple: never let untrusted code run on a runner that can access production secrets or infrastructure.

This story was originally published on HackerNoon at: https://hackernoon.com/nobody-hacked-the-firewall-inside-the-year-identity-became-the-whole-battlefield.
Identity, not firewalls, is now the real cybersecurity perimeter, as state actors and social engineering groups exploit trust to breach organizations.
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This story was written by: @drechi. Learn more about this writer by checking @drechi's about page, and for more stories, please visit hackernoon.com.

Modern cyberattacks are no longer focused on breaking firewalls or exploiting network vulnerabilities — they target identity itself. Campaigns like Salt Typhoon show how nation-state actors can remain undetected inside telecom infrastructure for years by exploiting trusted systems like lawful intercept backdoors. Meanwhile, groups like Scattered Spider achieve similar impact using pure social engineering, tricking help desk staff into resetting MFA and granting access without any malware. Together, these threats reveal a fundamental shift in cybersecurity: the weakest link is no longer the system, but the moment human or process trust is granted to a false identity.

This story was originally published on HackerNoon at: https://hackernoon.com/your-build-pipeline-is-the-new-perimeter-and-it-just-learned-to-replicate-itself.
CI/CD pipelines have become active attack surfaces, as supply chain worms and token theft turn software delivery into self-replicating malware vectors.
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This story was written by: @drechi. Learn more about this writer by checking @drechi's about page, and for more stories, please visit hackernoon.com.

Modern CI/CD pipelines are no longer passive delivery systems — they’ve become high-value attack surfaces where trust assumptions are routinely exploited. Incidents like the tj-actions GitHub Actions compromise show how mutable version tags can silently redirect trusted workflows into executing attacker-controlled code. Meanwhile, npm supply-chain worms such as Shai-Hulud demonstrate a more advanced threat: self-replicating malware that propagates through stolen publish tokens, harvesting credentials and reinfecting downstream systems without further human input. Across 2025–2026, the trend is clear: open-source ecosystems (npm, PyPI, GitHub Actions) are being hit by fast-moving, automation-driven attacks where compromise windows shrink from days to minutes. The result is a structural shift in security posture — where dependency integrity, token hygiene, and CI/CD hardening are no longer best practices, but survival requirements.

This story was originally published on HackerNoon at: https://hackernoon.com/trust-by-default-the-five-api-mistakes-driving-every-major-breach-right-now.
Five recurring API security flaws behind modern breaches—BOLA, broken auth, data exposure, SSRF, and inventory issues—explained via real-world cases.
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This story was written by: @drechi. Learn more about this writer by checking @drechi's about page, and for more stories, please visit hackernoon.com.

Most API breaches don’t come from advanced hacking techniques—they come from repeated, basic design failures. Across recent real-world incidents, five issues dominate: broken object-level authorization (BOLA), weak authentication, excessive data exposure, misconfiguration/SSRF, and poor API inventory management. These problems persist because APIs are built to trust requests by default. Until that changes, the same security failures will continue causing large-scale breaches across industries.