Loading vulnerability…
CVE-2026-42824, dubbed SearchLeak, is a critical vulnerability chain in Microsoft 365 Copilot Enterprise Search that Microsoft classified under command injection due to improper neutralization of special elements used in a command. The issue allowed attacker-controlled input supplied through the Copilot Search query parameter to be interpreted as executable prompt content rather than only as a search string. In demonstrated exploitation, this parameter-to-prompt injection was chained with a race condition in streamed HTML rendering, where attacker-controlled markup could be processed before sanitization completed, and with a Bing image-search server-side request mechanism that could be abused as an exfiltration channel. The chain enabled Copilot to search enterprise data available through the victim’s Microsoft Graph-backed access, extract targeted content from sources such as email, calendar, SharePoint, and OneDrive, embed that content into an outbound request, and disclose it to an attacker over the network after a victim opened a crafted link.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
49 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Цепочка из трёх уязвимостей в Microsoft 365 Copilot Search, сочетавшая parameter-to-prompt injection, race condition при HTML-рендеринге и SSRF-подобную эксфильтрацию через Bing, что позволяло красть данные после одного клика по ссылке.
A critical vulnerability referred to as SearchLeak in Microsoft Copilot Enterprise, mentioned as a related prior disclosure and noted as patched.
A data exfiltration vulnerability targeting M365 Copilot Enterprise.
Критическая уязвимость в Microsoft 365 Copilot Enterprise, позволявшая скрытно извлекать корпоративные данные через атаку SearchLeak с использованием цепочки из prompt injection, race condition при рендеринге HTML и обхода CSP через Bing/SSRF.
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.