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OpenAdvisories
High · 7.5 CVE-2026-59173 EUVD-2026-45376GHSA-6m23-f848-jcqf

Apache Traffic Server: DoS vulnerability in HTTP/2 via stalled flow-control conditions

Published Jul 18, 2026 · Updated Jul 20, 2026 · Assigned by apache

Description

Uncontrolled Resource Consumption vulnerability in Apache Traffic Server.

This issue affects Apache Traffic Server: from 9.0.0 through 9.1.13, from 10.0.0 through 10.1.2.

Users are recommended to upgrade to version 9.1.14 or 10.1.3, which fixes the issue.

Affected products

VendorProductAffectedFixed
Apache Software Foundation Apache Traffic Server 9.0.0 – ≤ 9.2.13, 10.0.0 – ≤ 10.1.2 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 12 trafficserver No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 24.04 LTS trafficserver No fix yet —
Ubuntu 18.04 LTS trafficserver No fix yet —
Ubuntu 16.04 LTS trafficserver No fix yet —
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 22.04 LTS trafficserver No fix yet —
Ubuntu Pro 20.04 LTS trafficserver No fix yet —

Advisories 1

References