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Vulnerability record · CVE-2019-17559 · published 23 March 2020

CVE-2019-17559: Apache traffic server http request smuggling vulnerability

Apache · Traffic Server

There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.8, and 8.0.0 to 8.0.5 with a smuggling attack and scheme parsing. Upgrade to versions 7.1.9 and 8.0.6 or later versions.

9.8 CVSS 3.1 Critical EPSS 3.2% · top 12.5% CWE-444 · HTTP request smuggling
9.8CVSS 3.1 base score, v2 7.5
3.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

There is a vulnerability in Apache Traffic Server 6.0.0 to 6.2.3, 7.0.0 to 7.1.8, and 8.0.0 to 8.0.5 with a smuggling attack and scheme parsing. Upgrade to versions 7.1.9 and 8.0.6 or later versions.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://lists.apache.org/thread.html/r99d18d0bc4daa05e7d0e5a63e0e22701a421b2ef5a8f4f7694c43869%40%3Cannounce.trafficserv Mailing ListVendor Advisory
https://www.debian.org/security/2020/dsa-4672 Third Party Advisory
https://lists.apache.org/thread.html/r99d18d0bc4daa05e7d0e5a63e0e22701a421b2ef5a8f4f7694c43869%40%3Cannounce.trafficserv Mailing ListVendor Advisory
https://www.debian.org/security/2020/dsa-4672 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-17559), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.