CVE-2021-37218

Privilege escalation in Hashicorp Nomad

8.8 HighFix available

HashiCorp Nomad and Nomad Enterprise Raft RPC layer allows non-server agents with a valid certificate signed by the same CA to access server-only functionality, enabling privilege escalation. Fixed in 1.0.10 and 1.1.4.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.67%Unchanged since Sep 8, 2021

What each source reports

NVD Score used 8.8

Record: CVE-2021-37218
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 6.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
Weakness: CWE-295
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-37218
Updated: 2026-11-02

EUVDEUVD-2021-2035 No score

Record: EUVD-2021-2035
Updated: 2026-11-03

GitHub AdvisoriesGHSA-c8x3-rg72-fwwg 8.8

Privilege escalation in Hashicorp Nomad

Record: GHSA-c8x3-rg72-fwwg
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-295
Updated: 2026-11-02

OSVALPINE-CVE-2021-37218 8.8

Record: ALPINE-CVE-2021-37218
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-03

OSV 8.8

Record: CVE-2021-37218
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-c8x3-rg72-fwwg 8.8

Privilege escalation in Hashicorp Nomad

Record: GHSA-c8x3-rg72-fwwg
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-295
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-37218 8.8

Record: UBUNTU-CVE-2021-37218
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGO-2022-0591 No score

Privilege escalation in Hashicorp Nomad in github.com/hashicorp/nomad

Privilege escalation in Hashicorp Nomad in github.com/hashicorp/nomad

Record: GO-2022-0591
Updated: 2026-11-02

Affected products

hashicorp nomad

Affected packages

Affected packages
Package	Affected	Fixed
`github.com/hashicorp/nomad` Go	before 1.0.10	1.0.10
`github.com/hashicorp/nomad` Go	1.1.0 up to 1.1.4	1.1.4
`nomad` Alpine:v3.15	1.1.1 up to 1.1.12-r0	1.1.12-r0
`nomad` Alpine:v3.16	1.1.1 up to 1.2.6-r0	1.2.6-r0
`nomad` Alpine:v3.17	1.1.1 up to 1.2.6-r0	1.2.6-r0
`nomad` Alpine:v3.18	1.1.1 up to 1.2.6-r0	1.2.6-r0
`github.com/hashicorp/nomad` Go	before 1.0.10, 1.1.0 up to 1.1.4	1.0.101.1.4
`nomad` Ubuntu:18.04:LTS	All versions, plus listed versions 0.4.0+dfsg-1	None known
`nomad` Ubuntu:20.04:LTS	All versions, plus listed versions 0.8.7+dfsg1-1ubuntu1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected, aliases, references	OSV
Nov 3, 2026	aliases	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-2021-37218 is a high vulnerability (CVSS 8.8) in Hashicorp Nomad, published September 7, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.67%, the 52nd percentile. Fixed in github.com/hashicorp/nomad 1.0.10.