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CoSnitch comprises three vulnerabilities in Microsoft Copilot Personal grouped under CVE-2026-24301 and classified as command injection. Two vulnerabilities form a one-click data-exfiltration chain: improper handling of the autorun and q URL parameters automatically executes an attacker-supplied prompt within a victim's authenticated Copilot session. The prompt can retrieve information using existing connector permissions and transmit it through Copilot's built-in URL-fetching capability. A separate indirect prompt-injection vulnerability allows hidden instructions in web page metadata to enter Copilot's persistent memory when the page is summarized, influencing subsequent conversations. The affected service is Copilot Personal; the findings do not establish the same behavior in Microsoft 365 Copilot.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
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31 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity command injection vulnerability in Copilot that could be exploited remotely for information disclosure.
A set of three vulnerabilities in Microsoft Copilot Personal, collectively branded CoSnitch, that allowed malicious prompt auto-execution via an undocumented autorun URL parameter, data exfiltration from connected services using Copilot’s existing permissions, and poisoning of Copilot’s persistent memory for future malicious behavior.
A set of three vulnerabilities in Microsoft Copilot Personal, collectively dubbed CoSnitch, that enable one-click malicious prompt execution, data exfiltration from connected applications, and a separate persistent memory-poisoning path via indirect prompt injection.
A critical vulnerability in Microsoft Copilot Personal that enables silent data exfiltration from a victim’s connected accounts via a malicious link, using auto-executed prompts, Copilot access to linked apps, outbound URL fetching, and persistent memory poisoning.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.