CVE-2020-27195

Use After Free in HashiCorp Nomad

9.1 CriticalFix available

HashiCorp Nomad and Nomad Enterprise version 0.9.0 up to 0.12.5 client file sandbox feature can be subverted using either the template or artifact stanzas. Fixed in 0.12.6, 0.11.5, and 0.10.6

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: None

Exploit likelihood

1.49%Up 0.9 points since Apr 14, 2021

What each source reports

NVD Score used 9.1

HashiCorp Nomad and Nomad Enterprise version 0.9.0 up to 0.12.5 client file sandbox feature can be subverted using either the template or artifact stanzas. Fixed in 0.12.6, 0.11.5, and 0.10.6

Record: CVE-2020-27195
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.0: 6.4 MediumAV:N/AC:L/Au:N/C:P/I:P/A:N
Updated: 2026-11-02

CVE List No score

HashiCorp Nomad and Nomad Enterprise version 0.9.0 up to 0.12.5 client file sandbox feature can be subverted using either the template or artifact stanzas. Fixed in 0.12.6, 0.11.5, and 0.10.6

Record: CVE-2020-27195
Updated: 2026-11-02

EUVDEUVD-2022-0884 No score

HashiCorp Nomad and Nomad Enterprise version 0.9.0 up to 0.12.5 client file sandbox feature can be subverted using either the template or artifact stanzas. Fixed in 0.12.6, 0.11.5, and 0.10.6

Record: EUVD-2022-0884
Updated: 2026-11-03

GitHub AdvisoriesGHSA-77cr-6gr8-7rr9 9.1

Use After Free in HashiCorp Nomad

HashiCorp Nomad and Nomad Enterprise version 0.9.0 up to 0.12.5 client file sandbox feature can be subverted using either the template or artifact stanzas. Fixed in 0.12.6, 0.11.5, and 0.10.6

Record: GHSA-77cr-6gr8-7rr9
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-416
Updated: 2026-11-02

OSVALPINE-CVE-2020-27195 9.1

HashiCorp Nomad and Nomad Enterprise version 0.9.0 up to 0.12.5 client file sandbox feature can be subverted using either the template or artifact stanzas. Fixed in 0.12.6, 0.11.5, and 0.10.6

Record: ALPINE-CVE-2020-27195
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-03

OSV 9.1

HashiCorp Nomad and Nomad Enterprise version 0.9.0 up to 0.12.5 client file sandbox feature can be subverted using either the template or artifact stanzas. Fixed in 0.12.6, 0.11.5, and 0.10.6

Record: CVE-2020-27195
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-02

OSVGHSA-77cr-6gr8-7rr9 9.1

Use After Free in HashiCorp Nomad

HashiCorp Nomad and Nomad Enterprise version 0.9.0 up to 0.12.5 client file sandbox feature can be subverted using either the template or artifact stanzas. Fixed in 0.12.6, 0.11.5, and 0.10.6

Record: GHSA-77cr-6gr8-7rr9
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-416
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-27195 9.1

HashiCorp Nomad and Nomad Enterprise version 0.9.0 up to 0.12.5 client file sandbox feature can be subverted using either the template or artifact stanzas. Fixed in 0.12.6, 0.11.5, and 0.10.6

Record: UBUNTU-CVE-2020-27195
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-02

OSVGO-2022-0806 No score

Use After Free in HashiCorp Nomad in github.com/hashicorp/nomad

Use After Free in HashiCorp Nomad in github.com/hashicorp/nomad

Record: GO-2022-0806
Updated: 2026-11-02

Affected products

hashicorp nomad

Affected packages

Affected packages
Package	Affected	Fixed
`github.com/hashicorp/nomad` Go	0.9.0 up to 0.10.6	0.10.6
`github.com/hashicorp/nomad` Go	0.11.0 up to 0.11.5	0.11.5
`github.com/hashicorp/nomad` Go	0.12.0 up to 0.12.6	0.12.6
`nomad` Alpine:v3.14	0.9.0 up to 0.12.7-r0	0.12.7-r0
`nomad` Alpine:v3.15	0.9.0 up to 0.12.7-r0	0.12.7-r0
`nomad` Alpine:v3.16	0.9.0 up to 0.12.7-r0	0.12.7-r0
`nomad` Alpine:v3.17	0.9.0 up to 0.12.7-r0	0.12.7-r0
`nomad` Alpine:v3.18	0.9.0 up to 0.12.7-r0	0.12.7-r0
`github.com/hashicorp/nomad` Go	0.9.0 up to 0.10.6, 0.11.0 up to 0.11.5, 0.12.0 up to 0.12.6	0.10.60.11.50.12.6
`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-2020-27195 is a critical vulnerability (CVSS 9.1) in Hashicorp Nomad, published October 22, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.49%, the 74th percentile. Fixed in github.com/hashicorp/nomad 0.10.6.

References

Show 5 moreShow less