tomcat: Apache Tomcat: Authentication bypass via missing critical step in JNDIRealm GSSAPI configuration

A flaw was found in Apache Tomcat. When the JNDIRealm was configured to authenticate binds using GSSAPI, an attacker could exploit a missing critical step in the authentication process. This allowed the attacker to bypass password verification and authenticate without providing the correct...

libssh: libssh: Denial of Service via zero-length input in ssh_get_hexa()

A flaw was found in libssh. The API function sshgethexa is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI Generic Security Service Application Program Interface authentication if the server's logging verbosity is se...

tomcat: Apache Tomcat: Authentication bypass via missing critical step in JNDIRealm GSSAPI configuration

A flaw was found in Apache Tomcat. When the JNDIRealm was configured to authenticate binds using GSSAPI, an attacker could exploit a missing critical step in the authentication process. This allowed the attacker to bypass password verification and authenticate without providing the correct...

libssh: libssh: Denial of Service via zero-length input in ssh_get_hexa()

A flaw was found in libssh. The API function sshgethexa is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI Generic Security Service Application Program Interface authentication if the server's logging verbosity is se...

tomcat: Apache Tomcat: Authentication bypass via missing critical step in JNDIRealm GSSAPI configuration

A flaw was found in Apache Tomcat. When the JNDIRealm was configured to authenticate binds using GSSAPI, an attacker could exploit a missing critical step in the authentication process. This allowed the attacker to bypass password verification and authenticate without providing the correct...

Unity Linux 20.1060e / 20.1070e Security Update: openssh (UTSA-2026-016786)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-016786 advisory. Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions...

Important: Red Hat Security Advisory: openssh security update

An update for openssh is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring...

Buffer Overflow

Overview Affected versions of this package are vulnerable to Buffer Overflow via unsafe string copying in the canonicalization process. An attacker can execute arbitrary code or cause a denial of service by supplying a specially crafted username in the MongoDB URI with authMechanism=GSSAPI before...

MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow

The MongoDB C Driver's Cyrus SASL integration performs unsafe string copying during username canonicalization, enabling a heap buffer overflow before any authentication or network traffic. This may be triggered by passing untrusted input in the username of a MongoDB URI with authMechanism=GSSAPI...

CVE-2026-6691 MongoDB C Driver Cyrus SASL Canonicalization Buffer Overflow

The MongoDB C Driver's Cyrus SASL integration performs unsafe string copying during username canonicalization, enabling a heap buffer overflow before any authentication or network traffic. This may be triggered by passing untrusted input in the username of a MongoDB URI with authMechanism=GSSAPI...

CLSA-2026-1778068747 Fix CVE(s): CVE-2026-0966

SECURITY UPDATE: heap buffer underflow in sshgethexa on zero-length or NULL input, remotely reachable via GSSAPI authentication logging - debian/patches/CVE-2026-0966.patch: reject NULL/zero-length input in sshgethexa in src/dh.c - CVE-2026-0966: fix heap buffer underflow in sshgethexa...

CVE-2026-6691: Buffer Copy without Checking Size of Input

The MongoDB C Driver's Cyrus SASL integration performs unsafe string copying during username canonicalization, enabling a heap buffer overflow before any authentication or network traffic. This may be triggered by passing untrusted input in the username of a MongoDB URI with authMechanism=GSSAPI...

CLSA-2026-1778003186 libssh: Fix of CVE-2026-0966

CVE-2026-0966: fix heap buffer underflow in sshgethexa on NULL or zero-length input, remotely reachable via GSSAPI authentication logging...

CLSA-2026-1777950533 openssh: Fix of CVE-2026-3497

CVE-2026-3497: fix information disclosure / DoS in GSSAPI key exchange by initialising gssbuf, recvtok, msgtok to GSSCEMPTYBUFFER and replacing non-terminating sshpktdisconnect with sshpacketdisconnect in kexgssc.c / kexgsss.c...

CLSA-2026-1777939266 libssh: Fix of CVE-2026-0966

CVE-2026-0966: fix heap buffer underflow in sshgethexa on NULL or zero-length input, remotely reachable via GSSAPI authentication logging...

CLSA-2026-1777455730 openssh: Fix of CVE-2026-3497

CVE-2026-3497: fix information disclosure or denial of service due to uninitialized variables in GSSAPI key exchange...

PT-2026-37642

Name of the Vulnerable Software and Affected Versions mongo-c-driver affected versions not specified Description The Cyrus SASL integration in the MongoDB C Driver performs unsafe string copying during username canonicalization. This flaw enables a heap buffer overflow—a condition where data...

Fedora 44 : libgsasl (2026-5868a8d652)

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-5868a8d652 advisory. GSSAPI server: Boundary check gsswrap token read OOB Tenable has extracted the preceding description block directly from the Fedora security advisory. Note...

CVE-2026-40356

In MIT Kerberos 5 aka krb5 before 1.22.3, there is an integer underflow and resultant out-of-bounds read if an application calls gssacceptseccontext on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process t...

NULL Pointer Dereference

Overview Affected versions of this package are vulnerable to NULL Pointer Dereference in the parsenegomessage function when the NegoEx mechanism is registered in the system's GSSAPI configuration. An attacker can cause the process to terminate by sending specially crafted requests remotely...