Full Report
Apache security advisory (AV26-422)
Analysis Summary
# Vulnerability: Apache HTTP Server Multiple Vulnerabilities (May 2026)
## CVE Details
*Note: While the specific CVE IDs were not listed in the summary advisory AV26-422, this advisory typically tracks the most recent batch of flaws addressed in the released version.*
- **CVE ID:** [Pending/Multiple - typically associated with Apache 2.4.x security releases]
- **CVSS Score:** N/A (The source indicates a high-priority "Security Advisory" status)
- **CWE:** Varies (Commonly includes Request Smuggling, Buffer Overflows, or Denial of Service in this product line)
## Affected Systems
- **Products:** Apache HTTP Server
- **Versions:** All versions prior to and including 2.4.65
- **Configurations:** Default and specific module-based configurations (e.g., `mod_proxy`, `mod_http2`, or `mod_rewrite` depending on the specific flaw).
## Vulnerability Description
This advisory addresses security flaws discovered in the Apache HTTP Server. Based on the version jump to 2.4.66, these vulnerabilities likely involve memory management errors, improper input validation, or protocol handling issues that could allow an attacker to bypass security controls or impact system stability.
## Exploitation
- **Status:** Not explicitly stated as exploited in the wild at the time of publication.
- **Complexity:** Typically ranges from **Low to Medium** for HTTP-based flaws.
- **Attack Vector:** **Network** (Remote)
## Impact
- **Confidentiality:** Variable (Possible information disclosure depending on the specific CVE)
- **Integrity:** Variable (Possible request smuggling or cache poisoning)
- **Availability:** Potentially **High** (Risk of Denial of Service (DoS) attacks)
## Remediation
### Patches
- **Upgrade to Apache HTTP Server version 2.4.66 or later.** This is the primary recommended action to address the vulnerabilities identified in AV26-422.
### Workarounds
- **Configuration Hardening:** Disable unnecessary modules (e.g., `mod_proxy`) if they are not required for your environment.
- **Access Control:** Implement restrictive `Allow`/`Deny` rules to limit exposure to sensitive endpoints.
## Detection
- **Version Scanning:** Use vulnerability scanners (Nessus, OpenVAS) to identify versions prior to 2.4.66.
- **Log Analysis:** Monitor error logs for unusual patterns, such as excessive segmentation faults or malformed HTTP requests that might indicate exploitation attempts.
## References
- **Vendor Advisory:** hxxps[://]httpd[.]apache[.]org/security/vulnerabilities_24[.]html
- **Apache Project Home:** hxxps[://]httpd[.]apache[.]org/
- **Cyber Centre Advisory:** hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/apache-security-advisory-av26-422