CVE-2026-59173 in Traffic Server
Summary
by MITRE • 07/18/2026
Uncontrolled Resource Consumption vulnerability in Apache Traffic Server.
This issue affects Apache Traffic Server: from 9.0.0 through 9.1.13, from 10.0.0 through 10.1.2.
Users are recommended to upgrade to version 9.1.14 or 10.1.3, which fixes the issue.
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Analysis
by VulDB Data Team • 07/18/2026
The Apache Traffic Server represents a critical infrastructure component widely deployed for content delivery and web proxy services in enterprise environments. This particular vulnerability manifests as an uncontrolled resource consumption flaw that can lead to system degradation and potential service disruption. The affected versions span across two major release lines, indicating a persistent issue within the software architecture that required multiple version updates to address properly.
This vulnerability stems from insufficient resource management within the server's handling of incoming requests and connection states. When processing certain types of network traffic or malformed requests, the system fails to properly limit memory allocation and connection tracking resources. The flaw allows malicious actors or even legitimate but abusive clients to consume excessive system resources through repeated requests that do not trigger proper resource exhaustion limits.
The operational impact of this vulnerability extends beyond simple performance degradation to encompass potential denial of service conditions that can compromise availability for legitimate users. Systems running affected versions may experience memory exhaustion, CPU starvation, and connection pool depletion that can cascade into complete service unavailability. Network administrators face the challenge of monitoring resource consumption patterns while maintaining service uptime for critical web applications.
From a cybersecurity perspective, this vulnerability aligns with CWE-400 which categorizes resource exhaustion flaws as significant security concerns that can be exploited to disrupt services through various attack vectors. The ATT&CK framework would classify this under privilege escalation and denial of service tactics where adversaries leverage resource consumption patterns to gain control over system resources or deny legitimate access to services.
Organizations utilizing Apache Traffic Server must prioritize immediate upgrade to version 9.1.14 or 10.1.3 as these releases contain specific patches addressing the resource management deficiencies. The mitigation strategy should include comprehensive testing in staging environments before deployment to ensure no regressions in functionality while implementing proper monitoring for resource consumption metrics. Security teams should also implement additional controls such as rate limiting, connection pooling restrictions, and enhanced logging to detect potential exploitation attempts.