CVE-2026-59173
Received Received - Intake

Uncontrolled Resource Consumption in Apache Traffic Server

Publication date: 2026-07-18

Last updated on: 2026-07-18

Assigner: Apache Software Foundation

Description
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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Meta Information

Published
2026-07-18
Last Modified
2026-07-18
Generated
2026-07-18
AI Q&A
2026-07-18
EPSS Evaluated
N/A
NVD
CVE-2026-59173
EUVD
EUVD-2026-45376

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
apache traffic_server From 9.0.0 (inc) to 9.1.13 (inc)
apache traffic_server From 10.0.0 (inc) to 10.1.2 (inc)
apache traffic_server 9.1.14
apache traffic_server 10.1.3

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.

Attack-Flow Graph

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Executive Summary

This is an Uncontrolled Resource Consumption vulnerability in Apache Traffic Server. It allows an attacker to consume excessive system resources, potentially leading to denial of service conditions. The issue affects versions from 9.0.0 through 9.1.13 and from 10.0.0 through 10.1.2.

Detection Guidance

To detect CVE-2026-59173, monitor for stalled HTTP/2 flow-control in Apache Traffic Server. Check for resource exhaustion symptoms like high CPU or memory usage during HTTP/2 traffic. Review logs for stalled connections or flow-control errors. Ensure ATS versions are updated beyond 9.2.13 or 10.1.2.

Impact Analysis

This vulnerability can impact you by causing your Apache Traffic Server to become unresponsive or crash due to excessive resource usage. This may lead to service disruptions, degraded performance, or complete downtime for systems relying on Apache Traffic Server.

Compliance Impact

This vulnerability causes uncontrolled resource consumption leading to denial-of-service (DoS) conditions. Such disruptions may impact systems handling sensitive data, potentially violating compliance requirements for availability under standards like GDPR (data processing continuity) and HIPAA (system availability for protected health information).

Mitigation Strategies

Upgrade Apache Traffic Server to version 9.1.14 or 10.1.3, which fixes the uncontrolled resource consumption vulnerability.

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