Detections
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Linux Distros Unpatched Vulnerability : CVE-2026-28780

critical Nessus Plugin ID 312354

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

 - 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.
 (CVE-2026-28780)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

See Also

https://access.redhat.com/security/cve/cve-2026-28780

https://ubuntu.com/security/CVE-2026-28780

Plugin Details

Severity: Critical

ID: 312354

File Name: unpatched_CVE_2026_28780.nasl

Version: 1.6

Type: Local

Agent: unix

Family: Misc.

Published: 5/6/2026

Updated: 5/14/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-28780

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: cpe:/o:centos:centos:7, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:centos:centos:httpd, p-cpe:/a:centos:centos:httpd-devel, p-cpe:/a:centos:centos:httpd-manual, p-cpe:/a:centos:centos:mod_ssl, p-cpe:/a:centos:centos:httpd-tools, p-cpe:/a:centos:centos:mod_ldap, p-cpe:/a:centos:centos:mod_proxy_html, p-cpe:/a:centos:centos:mod_session, p-cpe:/a:redhat:enterprise_linux:httpd, p-cpe:/a:redhat:enterprise_linux:httpd-devel, p-cpe:/a:redhat:enterprise_linux:httpd-manual, p-cpe:/a:redhat:enterprise_linux:mod_ssl, p-cpe:/a:redhat:enterprise_linux:httpd-tools, p-cpe:/a:redhat:enterprise_linux:mod_ldap, p-cpe:/a:redhat:enterprise_linux:mod_proxy_html, p-cpe:/a:redhat:enterprise_linux:mod_session, p-cpe:/a:redhat:enterprise_linux:httpd-filesystem, p-cpe:/a:redhat:enterprise_linux:mod_http2, p-cpe:/a:redhat:enterprise_linux:mod_md, p-cpe:/a:canonical:ubuntu_linux:apache2, cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:httpd-filesystem, p-cpe:/a:centos:centos:mod_http2, p-cpe:/a:centos:centos:mod_md, cpe:/o:canonical:ubuntu_linux:14.04:-:lts, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:redhat:enterprise_linux:httpd-core, p-cpe:/a:redhat:enterprise_linux:mod_lua, p-cpe:/a:centos:centos:httpd-core, p-cpe:/a:centos:centos:mod_lua, cpe:/o:redhat:enterprise_linux:10

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 5/4/2026

Reference Information

CVE: CVE-2026-28780