CVE-2026-58649

CVE

Threat entity extracted from intelligence sources

Frequency

occurrences

First Seen

September 10, 2026

Last Seen

September 10, 2026

API

Exploited in Wild

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Ransomware Use

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Public Exploits

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Attack Vector

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Vulnerability Overview

Exploitation Activity

Exploitation Intelligence

Critical .NET Vulnerabilities in Ubuntu Expose Sensitive Information57.8

On September 8, 2026, two critical vulnerabilities (CVE-2026-58649 and CVE-2026-69806) were disclosed in .NET components used in Ubuntu systems. Weeraphat Srisutham identified a flaw in the .NET watch BrowserRefreshServer that fails to validate cross-origin WebSocket connections, potentially allowin...