CVE-2026-28780
9.8 · CRITICALHeap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server.
Overview
CVE-2026-28780 is a critical-severity vulnerability. It was published on May 5, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical description
Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server.
If mod_proxy_ajp connects to a malicious AJP server this AJP server can send a malicious AJP message back to mod_proxy_ajp and cause it to write 4 attacker controlled bytes after the end of a heap based buffer.
This issue affects Apache HTTP Server: through 2.4.66.
Users are recommended to upgrade to version 2.4.67, which fixes the issue.
Remediation
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
References
How CyberStrike helps
Reason, not just scan
It reasons through your app's logic the way a human pentester would, so it finds flaws signature scanners miss.
Learn moreVerified findings
Every finding is proven exploitable before you see it, which cuts the false positives that bury real risk.
Learn moreAI-driven DAST and SAST
Probe running apps and read source from one engine, so issues are caught before and after they ship.
Learn moreOpen source
Read exactly how it tests and what it reports. CyberStrike is open source and in early access.
View the repo
Frequently asked questions
What is CVE-2026-28780?
CVE-2026-28780 is a critical-severity vulnerability. It was published on May 5, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2026-28780?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-28780?
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-28780?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-28780 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.
Related CRITICAL CVEs from 2026
View all- 10.0CVE-2025-61492
A command injection vulnerability in the execute_command function of terminal-controller-mcp 0.1.7 a
View details - 10.0CVE-2026-21858
n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0
View details - 10.0CVE-2025-70974
Fastjson before 1.2.48 mishandles autoType because, when an @type key is in a JSON document, and the
View details - 10.0CVE-2025-64090
This vulnerability allows authenticated attackers to execute commands via the hostname of the device
View details - 10.0CVE-2025-64093
Remote Code Execution vulnerability that allows unauthenticated attackers to inject arbitrary comman
View details - 10.0CVE-2025-65091
XWiki Full Calendar Macro displays objects from the wiki on the calendar. Prior to version 2.4.5, us
View details - 10.0CVE-2025-52694
Successful exploitation of the SQL injection vulnerability could allow an unauthenticated remote att
View details - 10.0CVE-2025-63314
A static password reset token in the password reset function of DDSN Interactive Acora CMS v10.7.1 a
View details - 10.0CVE-2025-40805
Affected devices do not properly enforce user authentication on specific API endpoints. This could f
View details - 10.0CVE-2026-0881
Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Th
View details - 10.0CVE-2025-68271
OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or mor
View details - 10.0CVE-2026-22686
Enclave is a secure JavaScript sandbox designed for safe AI agent code execution. Prior to 2.7.0, th
View details