# CVE-2026-50165: alf.io has Improper Access Control for Organization Owners that Exposes System Secrets

> Organization owners can read system-level configuration secrets, including API keys, due to improper access control in configuration endpoints.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Sep 2026
- **Updated:** 10 Sep 2026
- **Also known as:** GHSA-x473-r8w6-fcq5

## What is CVE-2026-50165?

CVE-2026-50165 is a high-severity missing authorization vulnerability in alfio-event alf.io, published on 9 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

alf.io is an open source ticket reservation system for conferences, trade shows, workshops, and meetups. An Improper Access Control issue in versions prior to 2.0-M5-2605 allows an organization owner to read system-level configuration secrets through organization/event scoped "single configuration" endpoints. The affected endpoints require organization or event ownership, but they accept an arbitrary configuration key and then return the first matching value from a lookup that includes system-level configuration. As a result, an organization owner can retrieve secrets intended to be administrator-only, including the system API key when it is configured. Version 2.0-M5-2605 fixes the issue.

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-50165?


## How do I fix CVE-2026-50165?

No fix has been published for CVE-2026-50165 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-50165 being exploited?

There is no known exploitation of CVE-2026-50165 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-50165 and fix it if it is affected.

What it is: CVE-2026-50165 is a high-severity missing authorization vulnerability in alfio-event alf.io, published on 9 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-50165 in the wild and no public exploit code.

Affected product: alfio-event alf.io. 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-2026-50165/ (Markdown: https://insights.sbomify.com/CVE-2026-50165/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-50165
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-50165
- OSV: https://osv.dev/vulnerability/CVE-2026-50165

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-50165/
Summaries are generated and may contain mistakes; the official description above is the record.