# CVE-2019-12866: Missing authorization in n/a

> Attackers can bypass authorization to access or modify unauthorized data via insecure direct object references in JetBrains YouTrack.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Jul 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-76p4-4v5g-fpxr

## What is CVE-2019-12866?

CVE-2019-12866 is a critical missing authorization vulnerability in Jetbrains Youtrack, published on 3 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An Insecure Direct Object Reference, with Authorization Bypass through a User-Controlled Key, was possible in JetBrains YouTrack. The issue was fixed in 2018.4.49168.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2019-12866?

It affects 1 product.


Products: Jetbrains Youtrack.

## How do I fix CVE-2019-12866?

No fix has been published for CVE-2019-12866 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-12866 being exploited?

There is no known exploitation of CVE-2019-12866 in the wild and no public exploit code.

## Other vulnerabilities in Jetbrains Youtrack

- [CVE-2026-62422](https://insights.sbomify.com/CVE-2026-62422/): Auth bypass in YouTrack (critical 10.0)
- [CVE-2022-24442](https://insights.sbomify.com/CVE-2022-24442/): Code injection in n/a (critical 9.8)
- [CVE-2021-43185](https://insights.sbomify.com/CVE-2021-43185/): Other in n/a (critical 9.8)
- [CVE-2021-25770](https://insights.sbomify.com/CVE-2021-25770/): Code injection in n/a (critical 9.8)
- [CVE-2019-12850](https://insights.sbomify.com/CVE-2019-12850/): SQL injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-12866 and fix it if it is affected.

What it is: CVE-2019-12866 is a critical missing authorization vulnerability in Jetbrains Youtrack, published on 3 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-12866 in the wild and no public exploit code.

Affected product: Jetbrains Youtrack. 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-2019-12866/ (Markdown: https://insights.sbomify.com/CVE-2019-12866/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-12866
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-12866
- OSV: https://osv.dev/vulnerability/CVE-2019-12866

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-12866/
Summaries are generated and may contain mistakes; the official description above is the record.