CVE-2026-58184 in Traffic Server
Summary
by MITRE • 07/29/2026
The Apache Traffic Server header_rewrite plugin can crash or corrupt memory during cookie operations and CIDR condition matching.
This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.
Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.
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Analysis
by VulDB Data Team • 07/29/2026
The Apache Traffic Server header_rewrite plugin vulnerability represents a critical memory corruption issue that can lead to system instability and potential denial of service conditions. This flaw manifests during two distinct operational scenarios involving cookie processing and CIDR condition matching within the plugin's execution flow. The vulnerability affects multiple version ranges spanning from 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3, indicating a widespread impact across the traffic server's release cycles.
The technical implementation flaw stems from inadequate input validation and memory management within the cookie operations and CIDR matching functions of the header_rewrite plugin. When processing HTTP headers containing specific cookie structures or when evaluating CIDR network conditions, the plugin fails to properly validate buffer boundaries and memory allocation parameters. This results in potential buffer overflows, use-after-free conditions, or memory corruption scenarios that can cause the Traffic Server process to crash unexpectedly or exhibit unpredictable behavior during normal operation.
From an operational perspective this vulnerability presents significant risks to web infrastructure deployments relying on Apache Traffic Server for content delivery and traffic management. The memory corruption can lead to complete service outages, data integrity issues, and potential exploitation opportunities for attackers seeking to disrupt services or escalate privileges. Organizations using the affected versions face increased risk of denial of service attacks that could impact availability of critical web applications and services.
The vulnerability aligns with CWE-121, heap-based buffer overflow, and CWE-416, use after free conditions, while also mapping to ATT&CK technique T1499.004 for endpoint denial of service. The specific nature of the issue suggests potential exploitation through carefully crafted HTTP requests that trigger cookie processing or CIDR matching logic within the plugin's configuration. Network defenders should consider this vulnerability as part of broader traffic server hardening efforts and implement immediate mitigation strategies.
The recommended remediation involves upgrading to version 9.2.15 or 10.1.4, which contain patches addressing the memory management issues in both cookie operations and CIDR condition evaluation. These updates implement proper bounds checking, memory allocation validation, and enhanced input sanitization mechanisms. Organizations should prioritize this upgrade as a critical security measure while also conducting thorough testing to ensure compatibility with existing traffic server configurations and plugin integrations. The patch addresses the root cause by implementing robust error handling and memory safety controls that prevent the conditions leading to memory corruption during header processing operations.