CVE-2023-43826

Apache Guacamole 1.5.3 and older do not consistently ensure that values received from a VNC server will not result in integer overflow. If a user connects to a malicious or compromised VNC server, specially-crafted data could result in memory corruption, possibly allowing arbitrary code to be executed with the privileges of the running guacd process. Users are recommended to upgrade to version 1.5.4, which fixes this issue.

• CWE-190

• http://www.openwall.com/lists/oss-security/2023/12/19/4Mailing List, Third Party Advisory
• https://lists.apache.org/thread/23gzwftpfgtq97tj6ttmbclry53kmwv6Mailing List, Vendor Advisory
• http://www.openwall.com/lists/oss-security/2023/12/19/4Mailing List, Third Party Advisory
• https://lists.apache.org/thread/23gzwftpfgtq97tj6ttmbclry53kmwv6Mailing List, Vendor Advisory

Published

Dec 19, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2023-43820A stack based buffer overflow exists in Delta Electronics De…7.8
• CVE-2023-43821A stack based buffer overflow exists in Delta Electronics De…7.8
• CVE-2023-43822A stack based buffer overflow exists in Delta Electronics De…7.8
• CVE-2023-43823A stack based buffer overflow exists in Delta Electronics De…7.8
• CVE-2023-43824A stack based buffer overflow exists in Delta Electronics De…7.8
• CVE-2023-43825Relative path traversal vulnerability in Shihonkanri Plus Ve…7.8
• CVE-2023-43828A Cross-site scripting (XSS) vulnerability in /panel/languag…5.4
• CVE-2023-4383A vulnerability, which was classified as critical, was found…7.8
• CVE-2023-43830A Cross-site scripting (XSS) vulnerability in /panel/configu…5.4
• CVE-2023-43835Super Store Finder 3.7 and below is vulnerable to authentica…8.8
• CVE-2023-43836There is a SQL injection vulnerability in the Jizhicms 2.4.9…6.5
• CVE-2023-43838An arbitrary file upload vulnerability in Personal Managemen…7.8