CVE-2026-27820

CVE

Threat entity extracted from intelligence sources

Frequency

occurrences

First Seen

July 16, 2026

Last Seen

July 16, 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 Ruby Vulnerabilities in IMAP and GzipReader Affecting Ubuntu70.5

Two critical vulnerabilities were discovered in Ruby affecting the Net::IMAP client and Zlib::GzipReader. CVE-2026-42258 allows remote attackers to inject arbitrary IMAP commands via CRLF sequences, while CVE-2026-27820 can lead to a buffer overflow through crafted gzip streams. These vulnerabilitie...