CVE-2026-28780
Last modified
CVE-2026-28780 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.38% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Http Server | < 2.4.67 |
References
- https://httpd.apache.org/security/vulnerabilities_24.htmlRelease Notes, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/05/9Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-28780?
How severe is CVE-2026-28780?
How do I fix CVE-2026-28780?
How Strix Helps
- 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.
Related CVEs from 2026
- CVE-2026-28775An unauthenticated Remote Code Execution (RCE) vulnerability…9.8
- CVE-2026-28776International Datacasting Corporation (IDC) SFX Series Super…9.8
- CVE-2026-28777International Datacasting Corporation (IDC) SFX2100 Satell…9.8
- CVE-2026-28778International Datacasting Corporation (IDC) SFX Series Super…9.8
- CVE-2026-28779Apache Airflow versions 3.1.0 through 3.1.7 session token (_…7.5
- CVE-2026-2878In Progress® Telerik® UI for AJAX, versions prior to 2026.1.…5.9
- CVE-2026-28781Craft is a content management system (CMS). Prior to 4.17.0-…6.5
- CVE-2026-28782Craft is a content management system (CMS). Prior to 5.9.0-b…4.3
- CVE-2026-28783Craft is a content management system (CMS). Prior to 5.9.0-b…9.1
- CVE-2026-28784Craft is a content management system (CMS). Prior to 5.8.22 …7.2
- CVE-2026-28785Ghostfolio is an open source wealth management software. Pri…9.8
- CVE-2026-28786Open WebUI is a self-hosted artificial intelligence platform…4.3
Are you affected by CVE-2026-28780?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST