Improper Input Validation in Apache Traffic Server (ATS) v9.2.09.2.14 & v10.1.010.1.3
CVE-2026-33267 Published on July 29, 2026
Apache Traffic Server: Untrusted @ headers can spoof ATS internal metadata
Improper Input Validation vulnerability in Apache Traffic Server.
This issue affects Apache Traffic Server: from 9.2.0 through 9.2.14, from 10.1.0 through 10.1.3.
Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fixes the issue.
Vulnerability Analysis
CVE-2026-33267 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 a high impact on confidentiality and integrity, and no impact on availability.
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2026-33267
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Affected Versions
Apache Software Foundation Apache Traffic Server:- Version 9.2.0, <= 9.2.14 is affected.
- Version 10.1.0, <= 10.1.3 is affected.