Workflow Security | Breaking Cybersecurity News | The Hacker News

Cybersecurity researchers have flagged a new class of CI/CD workflow weakness that allows attackers to hijack workflows and compromise open-source supply chains. The "critical exploitable pattern" has been codenamed Cordyceps by Novee Security. The issue can allow full attacker control of repositories at dozens of the largest organizations worldwide, including Microsoft, Google, Apache, and Cloudflare. "The flaw is exploitable by any unauthenticated user," Elad Meged, founding engineer and security researcher at Novee Security, said . "No org membership or special privileges; a free account is enough to forge approvals, push code, or steal credentials." The penetration-testing company's scan of about 30,000 high-impact repositories has revealed more than 300 to be fully exploitable, enabling attacker-controlled code execution, credential theft, and supply chain compromise, which can have severe downstream impacts. The core of the problem tri...

GitHub is moving to strengthen software supply chain security by updating " actions/checkout " to block pwn request attacks that exploit the risky use of the "pull_request_target workflow" trigger to run malicious code with the workflow's full privileges. Effective June 18, 2026, the latest version of "actions/checkout," the official GitHub action for checking out a repository into the workflow's runner, refuses common pwn request patterns by default. The change is expected to be backported to all currently supported major versions on July 16, 2026. "Actions/checkout v7 refuses to fetch fork pull request code in pull_request_target and workflow_run workflows (the latter only when workflow_run.event is a pull_request* event)," it added . The refusal occurs when the pull request is from a fork, and any of the following criteria is met, unless workflow authors explicitly opt out of it by setting the " allow-unsafe-pr-checkout...