Welcome to today's edition of Secret CISO, where we unravel the tangled web of cyber threats and security innovations shaping our digital landscape. In this issue, we delve into a series of alarming data breaches and the evolving tactics of cyber adversaries, painting a vivid picture of the current threat environment.

We begin with the Cheyenne and Arapaho Tribes, who are recovering from a ransomware attack that highlights the growing cyber threats faced by tribal governments. Meanwhile, Choice Hotels and CarGurus are grappling with significant data breaches, underscoring the vulnerabilities in hospitality and automotive sectors. Across the Atlantic, a massive breach in France exposes the fragility of identity verification processes, while Figure Technology Solutions faces a similar crisis, affecting nearly a million customers.

In the realm of AI, security researchers uncover risks associated with OpenClaw's Discord, where mentioning 'bitcoin' could lead to a ban, and Microsoft researchers reveal a sneaky ad injection method in AI chatbots. These incidents emphasize the need for vigilance in AI security.

Our exploration continues with a critical look at password managers, revealing a shared vulnerability that calls for ongoing scrutiny. We also dissect the zero-day CSS vulnerability, CVE-2026-2441, which serves as a reminder of the ever-evolving nature of web threats.

Finally, we spotlight Anthropic's Claude Code Security, a groundbreaking AI tool designed to detect hidden code vulnerabilities, marking a significant leap forward in automated security analysis.

Join us as we navigate these complex narratives, offering insights and strategies to fortify your defenses in an increasingly perilous digital world.

Data Breaches

1. Cheyenne and Arapaho Tribes Recover from Ransomware Attack: The Cheyenne and Arapaho Tribes are in the process of restoring their systems following a ransomware attack in December. This incident underscores the increasing cyber threats faced by tribal governments, as similar attacks have been reported in other tribes. Source: Tribal Business News
2. Choice Hotels International, Inc. Data Breach Alert: Choice Hotels has announced a data breach that potentially compromised personal information of individuals. The breach has prompted a warning from Wolf Haldenstein, highlighting the need for vigilance in protecting personal data. Source: National Law Review
3. CarGurus Data Breach: 1.7M Records Stolen?: CarGurus has reportedly suffered a data breach, with 1.7 million records potentially stolen by the notorious hacking group ShinyHunters. This breach raises concerns about data security in the automotive marketplace sector. Source: AIM Group
4. Massive Data Breach Exposes Sensitive Information on 1,200,000 Bank Accounts in France: A significant data breach in France has exposed sensitive information from 1.2 million bank accounts. The breach occurred when an intruder impersonated a civil servant's credentials, highlighting vulnerabilities in identity verification processes. Source: Daily Hodl
5. Figure Technology Faces Major Data Breach Impacting Nearly One Million Customers: Figure Technology Solutions has experienced a major data breach affecting approximately 967,000 customer accounts. The breach exposed personal details, raising concerns about data protection in financial technology services. Source: Crowdfund Insider

Security Research

1. Mentioning 'bitcoin' or crypto on AI agent OpenClaw's Discord will get you banned: Security researchers discovered numerous unsecured OpenClaw instances, with many malicious skills targeting crypto traders. This highlights the risks associated with AI platforms and the need for robust security measures to protect users from potential threats. Source: CoinDesk
2. Some "Summarize with AI" buttons are secretly injecting ads into your chatbot's memory: Microsoft researchers identified a new prompt injection method where attackers use seemingly harmless "Summarize with AI" buttons to inject ads into chatbot memory. This discovery underscores the importance of scrutinizing AI tools for hidden vulnerabilities that could be exploited for malicious purposes. Source: The Decoder
3. Security News This Week: Password Managers Share a Hidden Weakness: Researchers analyzed password managers like Bitwarden, Dashlane, and LastPass, revealing a shared vulnerability that could potentially affect other similar tools. This finding emphasizes the need for continuous security evaluations of password management solutions to safeguard user data. Source: WIRED
4. Zero-Day CSS: Deconstructing CVE-2026-2441 Security Vulnerability: The CSS injection vulnerability, CVE-2026-2441, is a new attack vector for data exfiltration. Although CSS injection has been discussed in academic circles, this specific vulnerability highlights the evolving nature of web security threats and the need for proactive defenses. Source: SitePoint
5. Anthropic Launches Claude Code Security to Detect Hidden Code Vulnerabilities: Anthropic's new tool, Claude Code Security, uses AI to analyze codebases, mimicking human security researchers to identify vulnerabilities. This innovation represents a significant advancement in automated security analysis, offering a new layer of protection for software development. Source: MLQ.ai

Final Words

As we wrap up today's edition of Secret CISO, it's clear that the digital landscape is fraught with challenges and opportunities alike. From the Cheyenne and Arapaho Tribes' recovery efforts to the alarming data breaches at Choice Hotels and CarGurus, we see how critical it is to stay vigilant and informed. These incidents remind us that no sector is immune to cyber threats, whether it's tribal governments, hospitality, or automotive marketplaces.

Meanwhile, the world of AI and technology continues to evolve, with new vulnerabilities emerging in unexpected places. The discovery of ad injections in chatbot memory and the shared weaknesses in password managers highlight the importance of scrutinizing our digital tools. Innovations like Anthropic's Claude Code Security offer hope, providing advanced solutions to detect hidden code vulnerabilities.

In this ever-changing environment, sharing knowledge is our strongest defense. If you found today's insights valuable, please share this newsletter with your friends and colleagues. Together, we can build a more secure digital future, one informed reader at a time.

Stay safe, stay informed, and see you in the next edition of Secret CISO!