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CVE PROGRAM SOURCE RECORD7.7 High

CVE-2026-111808

Apache Traffic Server: HTTP/2 DATA frame padding underflow lets a client trigger backend worker-pool exhaustion

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Status
Published
Published
Updated
Assigning organization
apache

Description

Apache Traffic Server can be used to exhaust an HTTP/1.1 origin's worker pool via a malformed padded HTTP/2 DATA frame. 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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Apache Software Foundation Apache Traffic Server

Default version status: unaffected

  • 8.0.0 to ≤ 8.1.11affected
  • 9.0.0 to ≤ 9.2.15affected
  • 10.0.0 to ≤ 10.1.4affected
  • 10.2.0affected

References