A timing attack against mod_auth_digest in Apache HTTP Server 2.4.66 allows a bypass of Digest authentication by a remote attacker. Users are recommended to upgrade to version 2.4.67, which fixes this issue.

[Web App Scanning] Apache 2.4.x < 2.4.67 Multiple Vulnerabilities

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 1ccc383b-486a-11f1-8b62-8447094a420f advisory.

    The Apache httpd project reports:
    mod_proxy_ajp: CVE-2026-34059, CVE-2026-34032, CVE-2026-33857, CVE-2026-28780     multiple modules: CVE-2026-33523     mod_authn_socache: CVE-2026-33007     mod_auth_digest: CVE-2026-33006     mod_dav_lock: mod_dav_lock     mod_md: CVE-2026-29168     mod_rewrite: CVE-2026-24072     mod_http2: CVE-2026-23918

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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

  - A timing attack against mod_auth_digest in Apache HTTP Server 2.4.66 allows a bypass of Digest     authentication by a remote attacker. Users are recommended to upgrade to version 2.4.67, which fixes this     issue. (CVE-2026-33006)

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

The version of httpd installed on the remote host is prior to 2.4.67. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2026-124-01 advisory.

    New httpd packages are available for Slackware 15.0 and -current to fix security issues.

Tenable has extracted the preceding description block directly from the httpd security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Apache httpd installed on the remote host is prior to 2.4.67. It is, therefore, affected by multiple vulnerabilities as referenced in the 2.4.67 advisory.

  - An escalation of privilege bug in various modules in Apache HTTP 2.4.66 and earlier allows local .htaccess     authors to read files with the privileges of the httpd user. Users are recommended to upgrade to version     2.4.67, which fixes this issue. (CVE-2026-24072)

  - Double Free and possible RCE vulnerability in Apache HTTP Server with the HTTP/2 protocol. This issue     affects Apache HTTP Server: 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the     issue. (CVE-2026-23918)

  - Allocation of Resources Without Limits or Throttling vulnerability in Apache HTTP Server's mod_md via OCSP     response data. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.66. Users are recommended to     upgrade to version 2.4.67, which fixes the issue. (CVE-2026-29168)

  - A NULL pointer dereference in mod_dav_lock in Apache HTTP Server 2.4.66 and earlier may allow an attacker     to crash the server with a malicious request.mod_dav_lock is not used internally by mod_dav or mod_dav_fs.
    The only known use-case for mod_dav_lock was mod_dav_svn from Apache Subversion earlier than version     1.2.0. Users are recommended to upgrade to version 2.4.66, which fixes this issue, or remove mod_dav_lock.
    (CVE-2026-29169)

  - A timing attack against mod_auth_digest in Apache HTTP Server 2.4.66 allows a bypass of Digest     authentication by a remote attacker. Users are recommended to upgrade to version 2.4.67, which fixes this     issue. (CVE-2026-33006)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
312249	FreeBSD : www/apache24 -- Multiple vulnerabilities (1ccc383b-486a-11f1-8b62-8447094a420f)	Nessus	FreeBSD Local Security Checks	high
312236	Linux Distros Unpatched Vulnerability : CVE-2026-33006	Nessus	Misc.	medium
312108	Slackware Linux 15.0 / current httpd Multiple Vulnerabilities (SSA:2026-124-01)	Nessus	Slackware Local Security Checks	high
311940	Apache 2.4.x < 2.4.67 Multiple Vulnerabilities	Nessus	Web Servers	high

Detections

Analytics

CVE-2026-33006

medium

Tenable Plugins

Coming Soon

high

medium

high

high