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: < 1% Very Low
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

Thu, 29 Oct 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-444
References
Metrics threat_severity

None

 threat_severity

Important

Fri, 23 Oct 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

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 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

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

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-10-23T21:22:42.961Z

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

Link: CVE-2026-111805

cve-icon Vulnrichment

Updated: 2026-10-23T20:52:17.395Z

cve-icon NVD

Status : Awaiting Analysis

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

Modified: 2026-10-23T22:16:55.533

Link: CVE-2026-111805

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-21T19:10:46Z

Links: CVE-2026-111805 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-29T14:15:07Z

Weaknesses
  • CWE-400

    Uncontrolled Resource Consumption

  • CWE-444

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