High 7.5Published Jul 18, 2026

CVE-2026-59173Apache Traffic Server: DoS vulnerability in HTTP/2 via stalled flow-control conditions

Updated under an hour ago (Oct 27, 2026, 2:30 PM ET)

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It affects Apache Software Foundation Apache Traffic Server and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache Traffic Server

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Analyzed
Record last updated: Jul 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache Traffic Server apache_software_foundation:apache_traffic_server (from the name)	from 9.0.0 through 9.2.13; from 10.0.0 through 10.1.2	CNA record
apache traffic_server apache:traffic_server	from 9.0.0 before 9.2.14; from 10.0.0 before 10.1.3	NVD

References

References

https://lists.apache.org/thread/lhlbhphmv5dsfgx1fx84mgonzbocpzhd	vendor-advisory, mailing-list
http://www.openwall.com/lists/oss-security/2026/07/17/5	mailing-list, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.