London Stock Exchange Group PLC

CloudSEK has identified more than 2,500 organisations that may have been potentially affected by a major AI supply chain incident involving LiteLLM in March 2026, with approximately 434,000 automated software-development pipelines linked to the exposure. The potentially affected organisations span critical industries including technology, cybersecurity, banking and financial services, telecommunications, manufacturing, consulting, logistics, and enterprise software, with high-confidence matches associated with major global organisations including NVIDIA, Samsung Electronics, Cisco Systems, Siemens, S&P Global, ServiceNow, Deloitte, Vodafone, X Corp, Zscaler, FedEx, Volkswagen, Thales and London Stock Exchange Group. The incident occurred after cybercriminal group Team PCP compromised LiteLLM, and malicious versions were reportedly available through the Python software repository PyPI for only around 40 minutes, yet CloudSEK's analysis identified approximately 434,000 CI/CD pipelines potentially connected to the exposure. Potentially accessible information included cloud credentials, source-code access, server keys, software-development secrets, AI API keys and other credentials that could give attackers access to critical business systems, and CloudSEK stresses that appearing in the dataset does not automatically mean an organisation was successfully breached but should be investigated urgently. CloudSEK has released a free exposure-checking tool to help organisations determine whether credentials or infrastructure associated with them appear in the identified dataset.

The FTSE 100 fell 1.04% to 10,400 while the Nikkei 225 rose 1.65% to 71,053, driven by central-bank rate signals and geopolitical developments. The Bank of England held rates at 3.75%, but hawkish comments from U.S. Fed Chair Warsh hinting at a possible rate hike pressured London, with the London Stock Exchange Group sliding 7% after a Rothschild Redburn downgrade. In contrast, the Nikkei 225 surged on easing Middle East tensions following a U.S.-Iran peace announcement, alongside strength in semiconductor stocks, even as the Bank of Japan raised rates from 0.75% to 1%. Falling oil prices further weighed on the energy-heavy FTSE 100, while Japan's market optimism reflected hopes that decades of deflation may be ending.