gnutls: gnutls: Authentication Bypass via NUL Character in Username

A flaw was found in gnutls. Servers configured with RSA-PSK Rivest–Shamir–Adleman – Pre-Shared Key wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass...

Important: Red Hat Security Advisory: gnutls and libtasn1 security update

An update for multiple packages is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On. Red Hat Product Security has rated this update as having a security impact of Important. A Common...

EUVD-2026-39533

swift-nio-http2's HTTP/2-to-HTTP/1.1 codec did not validate pseudo-header values for control characters before placing them into the translated HTTP/1.1 message. swift-nio-http2 1.44.1 adds validation of all pseudo-header values :path, :authority, :scheme, :method, and :status at both the HPACK...

CVE-2026-28898

swift-nio-http2's HTTP/2-to-HTTP/1.1 codec did not validate pseudo-header values for control characters before placing them into the translated HTTP/1.1 message. swift-nio-http2 1.44.1 adds validation of all pseudo-header values :path, :authority, :scheme, :method, and :status at both the HPACK...

Astra Linux – Vulnerability in c-ares

c-ares is a C library for asynchronous DNS requests. aresreadline is used to parse local configuration files such as /etc/resolv.conf, /etc/nsswitch.conf, the HOSTALIASES file, and, if using a c-ares version prior to 1.27.0, the /etc/hosts file. If any of these configuration files contains a NULL...

Astra Linux – Vulnerability in Firefox and Thunderbird

When handling the filename directive in the Content-Disposition header, the filename would be truncated if the filename contained a NULL character. This could lead to reflected file download attacks that potentially trick users into installing malware. This vulnerability affects Firefox 112, Focu...

Astra Linux – Vulnerability in OpenSSH

Using SSH in OpenSSH before version 10.1 allows for the use of the '\0' character in an SSH URI. This could potentially lead to code execution when a ProxyCommand is used...

RHEL 10 : gnutls (RHSA-2026:26409)

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:26409 advisory. The gnutls packages provide the GNU Transport Layer Security GnuTLS library, which implements cryptographic algorithms and protocols such ...

gnutls: gnutls: Authentication Bypass via NUL Character in Username

A flaw was found in gnutls. Servers configured with RSA-PSK Rivest–Shamir–Adleman – Pre-Shared Key wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass...

gnutls: gnutls: Authentication Bypass via NUL Character in Username

A flaw was found in gnutls. Servers configured with RSA-PSK Rivest–Shamir–Adleman – Pre-Shared Key wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass...

RockyLinux 9 : openssh (RLSA-2025:23480)

The remote RockyLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2025:23480 advisory. openssh: OpenSSH: Control characters in usernames can lead to code execution via ProxyCommand CVE-2025-61984 openssh: OpenSSH: Null character in ssh://...

Astra Linux - уязвимость в protobuf

Dereferencing a null pointer when a null char is present in a prototype symbol. The symbol is parsed incorrectly, resulting in an unchecked call into the name of the prototype file during the generation of the resulting error message. Since the symbol is incorrectly parsed, the file value is...

Gnutls: gnutls: authentication bypass via nul character in username

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CVE-2026-43895 jq: Embedded NUL in jq import paths causes local redaction-policy bypass and preserves sensitive fields in published artifacts

jq is a command-line JSON processor. In 1.8.1 and earlier, jq accepts embedded NUL bytes in import paths at the jq-language level, but later resolves those paths through C string operations during module and data-file lookup. This creates a mismatch between the logical import string that policy o...

EUVD-2026-28427

The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL 0...

UBUNTU-CVE-2026-39836

The Dial and LookupPort functions panic on Windows when provided with an input containing a NUL 0...

CVE-2026-42010

A flaw was found in gnutls. Servers configured with RSA-PSK Rivest–Shamir–Adleman – Pre-Shared Key wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass...

CVE-2026-42010 Gnutls: gnutls: authentication bypass via nul character in username

A flaw was found in gnutls. Servers configured with RSA-PSK Rivest–Shamir–Adleman – Pre-Shared Key wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass...

CVE-2026-42010

A flaw was found in gnutls. Servers configured with RSA-PSK Rivest–Shamir–Adleman – Pre-Shared Key wrongfully matched usernames containing a NUL character with truncated usernames. A remote attacker could exploit this by sending a specially crafted username, leading to an authentication bypass...

UBUNTU-CVE-2026-43861

mutt before 2.3.2 does not check for '\0' in urlpctdecode...