# CVE-2026-114475: Missing Authorization in hMailServer


- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 21 Oct 2026
- **Updated:** 29 Oct 2026
- **Also known as:** GHSA-83f6-27vp-q455

## What is CVE-2026-114475?

CVE-2026-114475 is a medium-severity vulnerability in Progressive Robot Ltd hMailServer, published on 21 Oct 2026. 

### Official description

Missing authorization in the REST role-management routes of Progressive Robot hMailServer 6.3.4 through 6.3.6 allows a remote authenticated user whose credential is confined to named domains to modify a custom role that accounts in other domains hold, and to create custom roles and delete any that no account holds. The routes that create, update and delete a custom role require the manage_roles permission, which only the serveradmin role holds; but a full-scope API key issued for named domains, and serveradmin assigned with a domain list, are serveradmin confined to those domains and hold manage_roles. The server's authorization gate did not refuse the three role routes to a confined credential and the route named no domain, so a credential issued to one tenant could raise or lower the permissions of a custom role assigned across other tenants - granting another domain's role every permission over its mailboxes and settings, or removing what it needs. A custom role may not hold administer_server, administer_domain or manage_roles, so the confined credential cannot make itself or another a server administrator by creating or rewriting a custom role.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-114475?


## How do I fix CVE-2026-114475?

No fix has been published for CVE-2026-114475 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-114475 being exploited?

There is no known exploitation of CVE-2026-114475 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-114475 and fix it if it is affected.

What it is: CVE-2026-114475 is a medium-severity vulnerability in Progressive Robot Ltd hMailServer, published on 21 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-114475 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-2026-114475/ (Markdown: https://insights.sbomify.com/CVE-2026-114475/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-114475
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-114475
- OSV: https://osv.dev/vulnerability/CVE-2026-114475

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-114475/
Summaries are generated and may contain mistakes; the official description above is the record.