Description
Apache Traffic Server forwarded a malformed 302 response that should have been rejected as a parse error, because the Transfer-Encoding: chunked carve-out bypassed the rejection path. A response that two peers can read differently is then stored and served, allowing cache poisoning and response-framing desync.



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.
Published: 2026-10-21
Score: 9.2 Critical
EPSS: < 1% Very Low
KEV: No
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Thu, 22 Oct 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache apache Traffic Server
Apache traffic Server
Apache Software Foundation
Apache Software Foundation apache Traffic Server
Vendors & Products Apache
Apache apache Traffic Server
Apache traffic Server
Apache Software Foundation
Apache Software Foundation apache Traffic Server

Wed, 21 Oct 2026 18:45:00 +0000

Type Values Removed Values Added
Description Apache Traffic Server forwarded a malformed 302 response that should have been rejected as a parse error, because the Transfer-Encoding: chunked carve-out bypassed the rejection path. A response that two peers can read differently is then stored and served, allowing cache poisoning and response-framing desync. 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.
Title Apache Traffic Server: A malformed 302 response bypasses parse-error rejection through the Transfer-Encoding: chunked carve-out
Weaknesses CWE-444
References
Metrics cvssV3_1

{'score': 9.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N'}

cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:L/SI:H/SA:N'}

Subscriptions

Apache Apache Traffic Server Traffic Server
Apache Software Foundation Apache Traffic Server
cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-10-21T18:26:32.566Z

Reserved: 2026-10-16T20:25:17.923Z

Link: CVE-2026-111816

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-21T19:16:59.330

Modified: 2026-10-22T16:56:52.840

Link: CVE-2026-111816

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T10:30:04Z

Weaknesses
  • CWE-444

    Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')