CVE-2026-59173
Apache Traffic Server: DoS vulnerability in HTTP/2 via stalled flow-control conditions
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.
INFO
Published Date :
July 18, 2026, 1:17 p.m.
Last Modified :
July 18, 2026, 2:17 p.m.
Remotely Exploit :
No
Source :
[email protected]
Solution
- Upgrade Apache Traffic Server to version 9.1.14 or 10.1.3.
- Apply the latest security patches for Apache Traffic Server.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-59173.
| URL | Resource |
|---|---|
| https://lists.apache.org/thread/lhlbhphmv5dsfgx1fx84mgonzbocpzhd | |
| http://www.openwall.com/lists/oss-security/2026/07/17/5 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-59173 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-59173
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-59173 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-59173 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jul. 18, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/07/17/5 -
New CVE Received by [email protected]
Jul. 18, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Apache Software Foundation', 'product': 'Apache Traffic Server', 'versions': [{'status': 'affected', 'version': '9.0.0', 'versionType': 'semver', 'lessThanOrEqual': '9.2.13'}, {'status': 'affected', 'version': '10.0.0', 'versionType': 'semver', 'lessThanOrEqual': '10.1.2'}], 'defaultStatus': 'unaffected'}] Added 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. Added CWE CWE-400 Added Reference https://lists.apache.org/thread/lhlbhphmv5dsfgx1fx84mgonzbocpzhd