CVE-2026-56391

CVE

Threat entity extracted from intelligence sources

Frequency

occurrences

First Seen

August 5, 2026

Last Seen

August 31, 2026

API

Exploited in Wild

—

Ransomware Use

—

Public Exploits

—

Attack Vector

—

Vulnerability Overview

Exploitation Activity

Exploitation Intelligence

Critical Vulnerabilities in Fedora 43: Information Disclosure and Header Smuggling57.9

Fedora 43 has reported two critical vulnerabilities affecting libsoup3 and perl-HTTP-Tiny. CVE-2026-5119, published on March 30, 2026, allows information disclosure via cleartext transmission of cookies during HTTPS tunnel establishment. This vulnerability impacts users of libsoup3 in Fedora 43. CVE...

Critical Vulnerabilities in GNU Core Utilities Affecting Ubuntu 26.0445.9

Two critical vulnerabilities were identified in GNU Core Utilities affecting Ubuntu 26.04 LTS. CVE-2025-5278 involves a heap buffer under-read in the sort command, potentially leading to denial of service or information leakage. CVE-2026-56391 concerns an out-of-bounds read in the uniq command when...