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

> Unauthenticated users can bypass ACLs and escalate privileges in Nomad clusters where mTLS is not enabled.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 5 Apr 2023
- **Updated:** 10 Feb 2025
- **Also known as:** GHSA-f8r8-h93m-mj77, GO-2023-1707, UBUNTU-CVE-2023-1782

## What is CVE-2023-1782?

CVE-2023-1782 is a critical missing authorization vulnerability in HashiCorp Nomad, published on 5 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

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.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2023-1782?

3 open source packages ship an affected version, including github.com/hashicorp/nomad. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `github.com/hashicorp/nomad` | Go | From 1.5.0 | 1.5.3 |
| `github.com/hashicorp/nomad` | Go | From 1.5.0 | 1.5.3 |
| `github.com/hashicorp/nomad` | Go | From 1.5.0 | 1.5.3 |

Products: Hashicorp Nomad.

## How do I fix CVE-2023-1782?

Upgrade github.com/hashicorp/nomad to 1.5.3 or later.

## Is CVE-2023-1782 being exploited?

There is no known exploitation of CVE-2023-1782 in the wild and no public exploit code.

## Other vulnerabilities in HashiCorp Nomad

- [CVE-2022-30324](https://insights.sbomify.com/CVE-2022-30324/): Privilege escalation in Hashicorp Nomad (critical 9.8)
- [CVE-2020-7956](https://insights.sbomify.com/CVE-2020-7956/): Improper Certificate Validation in HashiCorp Nomad (critical 9.8)
- [CVE-2019-12618](https://insights.sbomify.com/CVE-2019-12618/): Hashicorp Nomad Access Control Issues (critical 9.8)
- [CVE-2020-27195](https://insights.sbomify.com/CVE-2020-27195/): Use After Free in HashiCorp Nomad (critical 9.1)
- [CVE-2021-43415](https://insights.sbomify.com/CVE-2021-43415/): Improper Authentication in HashiCorp Nomad (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-1782 and fix it if it is affected.

What it is: CVE-2023-1782 is a critical missing authorization vulnerability in HashiCorp Nomad, published on 5 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-1782 in the wild and no public exploit code.

Affected packages and fixed versions:
- github.com/hashicorp/nomad (Go): affected from 1.5.0; fixed in 1.5.3
- github.com/hashicorp/nomad (Go): affected from 1.5.0; fixed in 1.5.3
- github.com/hashicorp/nomad (Go): affected from 1.5.0; fixed in 1.5.3

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-1782/ (Markdown: https://insights.sbomify.com/CVE-2023-1782/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-1782
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-1782
- OSV: https://osv.dev/vulnerability/CVE-2023-1782

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-1782/
Summaries are generated and may contain mistakes; the official description above is the record.