The vulnerabilities in libssh2 are addressed through libssh.

LibSSH has vulnerabilities in libssh2, including versions up to 1.11.1. The first vulnerability involves a denial-of-service attack during the pre-authentication phase, within the SSHMSGEXTINFO handler. A malicious SSH server can send a specially constructed extensioncount value, causing the clie...

Microsoft Exchange - Pre-Auth SSRF / ACL Bypass (ProxyNotFound)

Microsoft Exchange Server contains a remote code execution caused by improper input validation in the server component, letting remote attackers execute arbitrary code, exploit requires network access to the server. id: CVE-2021-28481 info: name: Microsoft Exchange - Pre-Auth SSRF / ACL Bypass...

SonicWall SMA1000 LFI

Pre-authentication path traversal vulnerability in SMA1000 firmware version 12.4.2, which allows an unauthenticated attacker to access arbitrary files and directories stored outside the web root directory. id: CVE-2023-0126 info: name: SonicWall SMA1000 LFI author: tess severity: high description...

SonicWall SRA 4600 VPN - SQL Injection

The SonicWall SRA 4600 VPN appliance is susceptible to a pre-authentication SQL injection vulnerability. id: CVE-2019-7481 info: name: SonicWall SRA 4600 VPN - SQL Injection author: darrenmartyn severity: high description: The SonicWall SRA 4600 VPN appliance is susceptible to a pre-authenticatio...

Apache OFBiz < 18.12.07 - Local File Inclusion

Arbitrary file reading vulnerability in Apache Software Foundation Apache OFBiz when using the Solr plugin. This is a pre-authentication attack. This issue affects Apache OFBiz: before 18.12.07. id: CVE-2022-47501 info: name: Apache OFBiz 18.12.07 - Local File Inclusion author: your3cho severity:...

OpenAM <= 16.0.5 - Pre-Auth RCE via jato.clientSession Deserialization

Open Access Management OpenAM is an access management solution. Prior to 16.0.6, OpenIdentityPlatform OpenAM is vulnerable to pre-authentication Remote Code Execution RCE via unsafe Java deserialization of the jato.clientSession HTTP parameter. This bypasses the WhitelistObjectInputStream...

CyberPanel - Command Injection

CyberPanel aka Cyber Panel before 2.3.5 allows Command Injection via completePath in the ProcessUtilities.outputExecutioner sink. There is /filemanager/upload aka File Manager upload unauthenticated remote code execution via shell metacharacters. id: CVE-2024-51568 info: name: CyberPanel - Comman...

Linux Distros Unpatched Vulnerability : CVE-2026-55199

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSHMSGEXTINFO handler in src/packet.c that...

CVE-2026-55199

libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSHMSGEXTINFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can s...

UBUNTU-CVE-2026-55199

libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSHMSGEXTINFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can s...

CVE-2026-55199

CVE-2026-55199 affects libssh2 up to version 1.11.1. The vulnerability lies in the SSH_MSG_EXT_INFO handler (src/packet.c), where return values from _libssh2_get_string() are unchecked. During key exchange, a malicious SSH server can set nr_extensions to 0xFFFFFFFF, causing the client to spin in ...

CVE-2026-55199 libssh2 - Pre-Authentication DoS via SSH_MSG_EXT_INFO Handler

libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSHMSGEXTINFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can s...

EUVD-2026-37782

libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSHMSGEXTINFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can s...

PT-2026-50527

Name of the Vulnerable Software and Affected Versions libssh2 versions prior to 1.11.1 Description A pre-authentication denial of service issue exists in the SSH MSG EXT INFO handler within src/packet.c. A malicious SSH server can trigger a CPU exhaustion loop on the client by sending a crafted...

CVE-2026-9507

A session fixation vulnerability has been identified in osTicket v1.18.2. This security flaw allows an attacker to hijack a victim’s account by keeping the initial session identifier OSTSESSID active after a successful login. The issue lies in the fact that the application does not invalidate the...

CVE-2026-9507 Session fixation vulnerability in Enhancesoft's osTicket

A session fixation vulnerability has been identified in osTicket v1.18.2. This security flaw allows an attacker to hijack a victim’s account by keeping the initial session identifier OSTSESSID active after a successful login. The issue lies in the fact that the application does not invalidate the...

EUVD-2026-37079

A session fixation vulnerability has been identified in osTicket v1.18.2. This security flaw allows an attacker to hijack a victim’s account by keeping the initial session identifier OSTSESSID active after a successful login. The issue lies in the fact that the application does not invalidate the...

CVE-2026-9507

CVE-2026-9507 affects osTicket v1.18.2. A session fixation flaw arises because the application does not invalidate the pre-authentication cookie or generate a new identifier for the authenticated context (OSTSESSID). As a result, an attacker could set a known session ID in the victim’s browser an...

Exploit for Deserialization of Untrusted Data in Facebook React

CVE-2025-55182 - React2Shell Pre-authentication RCE in Reac...

Exploit for Embedded Malicious Code in Tukaani Xz

XZ Backdoor Labs CVE-2024-3094 Safe, hands-on labs for...