PT-2026-120786 · Apache · Apache Traffic Server

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CVE-2026-111809

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Published

2026-10-21

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Updated

2026-10-21

CVSS v3.1

9.3

Critical

VectorAV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
Apache Traffic Server allows request smuggling via HEAD requests that carry Content-Length or Transfer-Encoding.
This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0.
Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.

Fix

HTTP Request/Response Smuggling

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Weakness Enumeration

Related Identifiers

CVE-2026-111809

Affected Products

Apache Traffic Server