Cyber Security Shares Drop After Fortune Uncovers New Anthropic Model. SentinelOne Plunges 9%; Zscaler Sinks 8%; CrowdStrike, Palo Alto Networks Down Around 7%

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Cybersecurity stocks are moving lower after Fortune reported that Anthropic inadvertently revealed details of an upcoming model release “in what appears to be a significant security lapse.”

Cyber security shares dropped on Friday. Tenable Holdings down over 10%; SentinelOne down 9%; Zscaler down 8%; CrowdStrike, Palo Alto Networks down around 7%.

A draft blog from Anthropic showed it is testing a new AI model that has powerful cyber capabilities, Beatrice Nolan of Fortune reports. A spokesperson from Anthropic confirmed to the website that it is training and testing a new model.

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SentinelOne Plunges 9%; Zscaler Sinks 8%; CrowdStrike, Palo Alto Networks Down Around 7%\n</h2>\n<h4 class=\"meta\">\n<a class=\"head\" href=\"https://laohu8.com/wemedia/1079075236\">\n\n<div class=\"h-thumb\" style=\"background-image:url(https://static.tigerbbs.com/8274c5b9d4c2852bfb1c4d6ce16c68ba);background-size:cover;\"></div>\n\n<div class=\"h-content\">\n<p class=\"h-name\">Tiger Newspress </p>\n<p class=\"h-time smaller\">2026-03-27 22:01</p>\n</div>\n</a>\n</h4>\n</header>\n<article>\n<html><head></head><body><p>Cybersecurity stocks are moving lower after Fortune reported that Anthropic inadvertently revealed details of an upcoming model release “in what appears to be a significant security lapse.” </p><p>Cyber security shares dropped on Friday. 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