# CVE-2026-114476: Incorrect Authorization in hMailServer


- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 21 Oct 2026
- **Updated:** 29 Oct 2026
- **Also known as:** GHSA-94cg-hqr8-p6wh

## What is CVE-2026-114476?

CVE-2026-114476 is a high-severity vulnerability in Progressive Robot Ltd hMailServer, published on 21 Oct 2026. 

### Official description

Incorrect authorization in the REST administration API of Progressive Robot hMailServer 6.3.4 through 6.3.6 allows a remote authenticated user whose credential holds the manage_roles permission in named domains - a full-scope API key issued for those domains, or an account assigned the serveradmin role with a list of domains - to obtain the server administrator's authority. An account's admin level gives it authority, and a role assigned to it replaces that authority, which is how an administrator narrows an account whose admin level is the server administrator's. The route that takes a role away (DELETE /api/v1/role-assignments/{address}) checked only that the credential takes in what the account held at the time, not what it would hold afterwards, so such a credential could take a narrowing role away from an account in its domains whose admin level is the server administrator's, returning it to the server administrator's authority, and, having set that account's password while it held the narrower role, sign in as the server administrator.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-114476?


## How do I fix CVE-2026-114476?

No fix has been published for CVE-2026-114476 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-114476 being exploited?

There is no known exploitation of CVE-2026-114476 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-114476 and fix it if it is affected.

What it is: CVE-2026-114476 is a high-severity vulnerability in Progressive Robot Ltd hMailServer, published on 21 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-114476 in the wild and no public exploit code.

Affected product: Progressive Robot Ltd hMailServer. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2026-114476/ (Markdown: https://insights.sbomify.com/CVE-2026-114476/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-114476
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-114476
- OSV: https://osv.dev/vulnerability/CVE-2026-114476

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-114476/
Summaries are generated and may contain mistakes; the official description above is the record.