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Microsoft 365 Copilot vulnerability leaks sensitive data

By PulseAugur Editorial · [1 sources] ·

A security vulnerability, identified as CVE-2026-42824, has been discovered in Microsoft 365 Copilot. This flaw allows the AI assistant to inadvertently leak sensitive information, effectively turning it into a tool for data exfiltration. The vulnerability was detailed by Patrick Spencer of Kiteworks on June 23, 2026. AI

IMPACT This vulnerability highlights risks of AI assistants inadvertently exposing sensitive data, potentially impacting enterprise adoption and security protocols.

RANK_REASON Disclosure of a security vulnerability in a widely used AI product.

Read on Mastodon — fosstodon.org →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Microsoft 365 Copilot vulnerability leaks sensitive data

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
Disclosure of a security vulnerability in a widely used AI product.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
safety, product
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
62 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.

Full methodology in our editorial standards.

COVERAGE [1]

  1. Mastodon — fosstodon.org TIER_1 English(EN) · [email protected] ·

    Read this insight from Patrick Spencer of Kiteworks from June 23, 2026. "Microsoft 365 Copilot SearchLeak (CVE-2026-42824): When Your # AI Assistant Becomes an

    Read this insight from Patrick Spencer of Kiteworks from June 23, 2026. "Microsoft 365 Copilot SearchLeak (CVE-2026-42824): When Your # AI Assistant Becomes an Exfiltration Tool" 🫨 https:// cybersec.kiteworks.com/s/micro soft-365-copilot-searchleak-cve-2026-42824-when-your-ai-ass…

    LINKS kiteworks.com/…/microsoft-copilot-searchl…

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