Apache Traffic Server Uncontrolled Resource Consumption ( 9.1.13, 10.1.2)
CVE-2026-59173 Published on July 18, 2026
Apache Traffic Server: DoS vulnerability in HTTP/2 via stalled flow-control conditions
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.
Vulnerability Analysis
CVE-2026-59173 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2026-59173 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-59173
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Affected Versions
Apache Software Foundation Apache Traffic Server:- Version 9.0.0, <= 9.2.13 is affected.
- Version 10.0.0, <= 10.1.2 is affected.