CVE-2023-1782 | Nomad Unauthenticated Client Agent HTTP Request Privilege Escalation

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.

Published: 2023-04-05 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-1782 is rated Moderate Risk (57.5/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.76%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-1782

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.46% 0.76% +0.29%
2 2026-05-29 0.29% 0.46% +0.17%
3 2026-04-07 — 0.29% —

Full EPSS history (15 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-1782

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.9 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.1 6.0 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]

Weakness enumeration for CVE-2023-1782

GitHub Security Advisory for CVE-2023-1782

GHSA-f8r8-h93m-mj77 · Severity: high · Ecosystem: go — HashiCorp Nomad vulnerable to unauthenticated client agent HTTP request privilege escalation

OS Trackers for CVE-2023-1782

vendor priority summary link
alpine critical CVE-2023-1782: 1 source package rows (nomad); 3 state rows across 2 repos (3.18-community, edge-community); fixed 2, open 1. https://security.alpinelinux.org/vuln/CVE-2023-1782
ubuntu medium CVE-2023-1782 medium priority: Ubuntu including 1 source packages (nomad), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 8, ignored 2, needs-triage 2, not-affected 1. https://ubuntu.com/security/CVE-2023-1782

Affected software / configurations for CVE-2023-1782

Vendor Product Version Raw CPE
hashicorp nomad >= 1.5.0, <= 1.5.2 cpe:2.3:a:hashicorp:nomad:*:*:*:*:-:*:*:*
hashicorp nomad >= 1.5.0, <= 1.5.2 cpe:2.3:a:hashicorp:nomad:*:*:*:*:enterprise:*:*:*

References for CVE-2023-1782

cvelogic Threat Intelligence