CVE-2026-33267
Received Received - Intake

Improper Input Validation in Apache Traffic Server

Publication date: 2026-07-29

Last updated on: 2026-07-29

Assigner: Apache Software Foundation

Description
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.

CVSS Scores

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Meta Information

Published
2026-07-29
Last Modified
2026-07-29
Generated
2026-07-29
AI Q&A
2026-07-29
EPSS Evaluated
N/A
NVD
CVE-2026-33267
EUVD
EUVD-2026-50169

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
apache traffic_server to 9.2.14 (inc)
apache traffic_server to 10.1.3 (inc)
apache traffic_server 9.2.15
apache traffic_server 10.1.4

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-20 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.

Attack-Flow Graph

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Executive Summary

This is an Improper Input Validation vulnerability in Apache Traffic Server affecting versions 9.2.0 through 9.2.14 and 10.1.0 through 10.1.3. It allows attackers to send specially crafted input that the server fails to validate properly, potentially leading to unexpected behavior or security issues.

Detection Guidance

To detect this vulnerability, check the version of Apache Traffic Server running on your system. Compare it against the affected versions (9.2.0-9.2.14, 10.1.0-10.1.3). Use commands like 'traffic_server -v' or check package managers (e.g., 'apt list --installed | grep trafficserver' or 'yum list installed | grep trafficserver').

Impact Analysis

The vulnerability could allow remote attackers to cause denial of service, execute arbitrary code, or gain unauthorized access to sensitive data. Since the CVSS score is high (10.0 for v3.1), the impact is severe and could disrupt services relying on Apache Traffic Server.

Mitigation Strategies

Upgrade Apache Traffic Server to version 9.2.15 or 10.1.4 immediately. Follow your distribution's update process or download the patched version from the official Apache Traffic Server website.

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