CVE-2020-1944

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...

9.8 CriticalFix available

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 Transfer-Encoding and Content length headers. Upgrade to versions 7.1.9 and 8.0.6 or later versions.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

2.73%Up 0.9 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

Record: CVE-2020-1944
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-444
Updated: 2026-11-02

CVE List No score

Record: CVE-2020-1944
Updated: 2026-11-02

EUVDEUVD-2020-12751 No score

Record: EUVD-2020-12751
Updated: 2026-11-03

GitHub AdvisoriesGHSA-6gpv-f676-prm8 9.8

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...

Record: GHSA-6gpv-f676-prm8
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-444
Updated: 2026-11-02

OSV 9.8

Record: CVE-2020-1944
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-1944 9.8

Record: DEBIAN-CVE-2020-1944
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-1944 9.8

Record: UBUNTU-CVE-2020-1944
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`trafficserver` Debian:12	before 8.0.6+ds-1	8.0.6+ds-1
`trafficserver` Debian:10 From an advisory covering 4 CVEs	before 8.0.2+ds-1+deb10u2, plus listed versions 8.0.2+ds-18.0.2+ds-1+deb10u1	8.0.2+ds-1+deb10u2
`trafficserver` Ubuntu:16.04:LTS	All versions, plus listed versions 5.3.0-2ubuntu15.3.0-2ubuntu2	None known
`trafficserver` Ubuntu:18.04:LTS	All versions, plus listed versions 7.0.0-57.1.2+ds-27.1.2+ds-2build17.1.2+ds-3	None known
`trafficserver` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 8.0.5+ds-18.0.5+ds-28.0.5+ds-2build18.0.5+ds-2ubuntu18.0.5+ds-38.0.5+ds-3ubuntu0.1~esm1	None known
`trafficserver` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 8.1.1+ds-1.19.1.1+ds-2build19.1.1+ds-2ubuntu0.1~esm19.1.1+ds-2ubuntu0.19.1.1+ds-2ubuntu0.1+esm1	None known

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases, products	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-1944 is a critical vulnerability (CVSS 9.8) in Apache Traffic Server, published March 23, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.73%, the 86th percentile. Fixed in trafficserver 8.0.6+ds-1.