Description
Apache Traffic Server can be used to exhaust an HTTP/1.1 origin's worker pool via a truncated HTTP/2 Content-Length value.



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: 7.7 High
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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History

Wed, 21 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Description Apache Traffic Server can be used to exhaust an HTTP/1.1 origin's worker pool via a truncated HTTP/2 Content-Length value. 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: HTTP/2 Content-Length truncation lets a client trigger backend worker-pool exhaustion
Weaknesses CWE-400
References
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'}

cvssV4_0

{'score': 7.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-10-21T19:10:46.319Z

Reserved: 2026-10-16T20:16:14.017Z

Link: CVE-2026-111805

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-21T20:17:22.257

Modified: 2026-10-21T20:17:22.257

Link: CVE-2026-111805

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-21T22:30:07Z

Weaknesses
  • CWE-400

    Uncontrolled Resource Consumption