CVE-2025-65114
Received Received - Intake
HTTP Request Smuggling in Apache Traffic Server via Malformed Chunked Messages

Publication date: 2026-04-02

Last updated on: 2026-04-06

Assigner: Apache Software Foundation

Description
Apache Traffic Server allows request smuggling if chunked messages are malformed.  This issue affects Apache Traffic Server: from 9.0.0 through 9.2.12, from 10.0.0 through 10.1.1. Users are recommended to upgrade to version 9.2.13 or 10.1.2, which fix the issue.
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Meta Information
Published
2026-04-02
Last Modified
2026-04-06
Generated
2026-06-16
AI Q&A
2026-04-02
EPSS Evaluated
2026-06-14
NVD
CVE-2025-65114
EUVD
EUVD-2025-209190
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
apache traffic_server From 10.0.0 (inc) to 10.1.2 (exc)
apache traffic_server From 9.0.0 (inc) to 9.2.13 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-444 The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.
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Executive Summary

This vulnerability in Apache Traffic Server allows request smuggling when chunked messages are malformed.

Request smuggling is a technique where an attacker sends specially crafted HTTP requests that can bypass security controls or interfere with how requests are processed by the server.

Impact Analysis

The vulnerability can allow attackers to smuggle HTTP requests through Apache Traffic Server, potentially bypassing security controls, causing unexpected behavior, or enabling further attacks such as cache poisoning or unauthorized access.

Mitigation Strategies

Users are recommended to upgrade Apache Traffic Server to version 9.2.13 or 10.1.2, which fix the request smuggling issue caused by malformed chunked messages.

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