CVE-2026-111816

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.

CVSS v3 9.3 CRITICAL

9.3^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc

Configurations

No configuration.

History

26 Oct 2026, 10:10

Type	Values Removed	Values Added
Summary		(es) Apache Traffic Server reenvió una respuesta 302 malformada que debería haber sido rechazada como un error de análisis, porque la excepción de ’Transfer-Encoding: chunked’ eludió la ruta de rechazo. Una respuesta que dos pares pueden interpretar de manera diferente se almacena y se sirve, lo que permite el envenenamiento de caché y la desincronización del encuadre de respuesta. Este problema afecta a Apache Traffic Server: desde la versión 8.0.0 hasta la 8.1.11 incluida, desde la 9.0.0 hasta la 9.2.15 incluida, desde la 10.0.0 hasta la 10.1.4 incluida, y la versión 10.2.0. Se recomienda a los usuarios actualizar a las versiones 9.2.16, 10.1.5 o 10.2.1, que solucionan el problema.

21 Oct 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-21 19:16

Updated : 2026-10-26 10:10

NVD link : CVE-2026-111816

Mitre link : CVE-2026-111816

CVE.ORG link : CVE-2026-111816

JSON object : View

Products Affected

No product.

CWE

CWE-444

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

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