Bug 2466913 (CVE-2026-28780) - CVE-2026-28780 Apache HTTP Server: mod_proxy_ajp: Apache HTTP Server mod_proxy_ajp: Arbitrary code execution via heap-based buffer overflow
Summary: CVE-2026-28780 Apache HTTP Server: mod_proxy_ajp: Apache HTTP Server mod_prox...
Keywords:
Status: NEW
Alias: CVE-2026-28780
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2466956
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-05 22:01 UTC by OSIDB Bzimport
Modified: 2026-06-22 15:15 UTC (History)
11 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:21391 0 None None None 2026-05-27 17:31:37 UTC
Red Hat Product Errata RHSA-2026:21433 0 None None None 2026-05-27 21:26:15 UTC
Red Hat Product Errata RHSA-2026:22140 0 None None None 2026-06-01 02:26:30 UTC
Red Hat Product Errata RHSA-2026:27200 0 None None None 2026-06-22 15:15:27 UTC
Red Hat Product Errata RHSA-2026:27201 0 None None None 2026-06-22 15:13:38 UTC

Description OSIDB Bzimport 2026-05-05 22:01:35 UTC 
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.
Comment 2 errata-xmlrpc 2026-05-27 17:31:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:21391 https://access.redhat.com/errata/RHSA-2026:21391
Comment 3 errata-xmlrpc 2026-05-27 21:26:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:21433 https://access.redhat.com/errata/RHSA-2026:21433
Comment 4 errata-xmlrpc 2026-06-01 02:26:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:22140 https://access.redhat.com/errata/RHSA-2026:22140
Comment 5 errata-xmlrpc 2026-06-22 15:13:37 UTC 
This issue has been addressed in the following products:

  Red Hat JBoss Core Services 2.4.62.SP4

Via RHSA-2026:27201 https://access.redhat.com/errata/RHSA-2026:27201
Comment 6 errata-xmlrpc 2026-06-22 15:15:26 UTC 
This issue has been addressed in the following products:

  JBoss Core Services on RHEL 7
  JBoss Core Services for RHEL 8

Via RHSA-2026:27200 https://access.redhat.com/errata/RHSA-2026:27200
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