Vulnerability · Published Jul 18, 2026 · Assigned by apache
CVE-2026-59173Apache Traffic Server: DoS vulnerability in HTTP/2 via stalled flow-control conditions
High 7.5
In plain English
A high-severity uncontrolled resource consumption in Apache Traffic Server from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.7%top 45.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | trafficserver | no fix listed | DEBIAN-CVE-2026-59173 |
| Ubuntu:24.04:LTS | trafficserver | no fix listed | UBUNTU-CVE-2026-59173 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Traffic Server | 9.0.0 – through 9.2.1310.0.0 – through 10.1.2 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H