CVE-2023-1782

Nomad Unauthenticated Client Agent HTTP Request Privilege Escalation

10.0 CriticalFix available

HashiCorp Nomad and Nomad Enterprise versions 1.5.0 up to 1.5.2 allow unauthenticated users to bypass intended ACL authorizations for clusters where mTLS is not enabled. This issue is fixed in version 1.5.3.

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

0.77%Up 0.7 points since Apr 6, 2023

What each source reports

CVE List Score used 10.0

Nomad Unauthenticated Client Agent HTTP Request Privilege Escalation

Record: CVE-2023-1782
CVSS 3.1: 10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-862
Updated: 2026-11-02

EUVDEUVD-2023-1283 10.0

Record: EUVD-2023-1283
CVSS 3.1: 10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-f8r8-h93m-mj77 8.8

HashiCorp Nomad vulnerable to unauthenticated client agent HTTP request privilege escalation

Record: GHSA-f8r8-h93m-mj77
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-285, CWE-862
Updated: 2026-11-02

NVD 9.9

Record: CVE-2023-1782
CVSS 3.1: 9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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-862
Updated: 2026-11-02

OSVALPINE-CVE-2023-1782 9.8

Record: ALPINE-CVE-2023-1782
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: 2026-11-03

OSV 9.9

Nomad Unauthenticated Client Agent HTTP Request Privilege Escalation

Record: CVE-2023-1782
CVSS 3.1: 9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-862
Updated: 2026-11-02

OSVGHSA-f8r8-h93m-mj77 8.8

HashiCorp Nomad vulnerable to unauthenticated client agent HTTP request privilege escalation

Record: GHSA-f8r8-h93m-mj77
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-285, CWE-862
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-1782 9.9

Record: UBUNTU-CVE-2023-1782
CVSS 3.1: 9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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: 2026-11-06

OSVGO-2023-1707 No score

HashiCorp Nomad vulnerable to unauthenticated client agent HTTP request privilege escalation in github.com/hashicorp/nomad

HashiCorp Nomad vulnerable to unauthenticated client agent HTTP request privilege escalation in github.com/hashicorp/nomad

Record: GO-2023-1707
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`github.com/hashicorp/nomad` Go	1.5.0 to 1.5.2	1.5.3
`nomad` Alpine:v3.18	1.5.0 up to 1.5.3-r0	1.5.3-r0
`github.com/hashicorp/nomad` Go	1.5.0 up to 1.5.3	1.5.3

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts	OSV
Nov 3, 2026	affected, aliases, references	OSV
Nov 3, 2026	aliases, published	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-2023-1782 is a critical vulnerability (CVSS 10.0) in Hashicorp Nomad, published April 5, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.77%, the 55th percentile. Fixed in github.com/hashicorp/nomad 1.5.3.