# CVE-2026-75044: JetBrains YouTrack missing authorization in mailbox endpoint

Source: https://junglewise.ai/threats/cve-2026-75044-jetbrains-youtrack-missing-authorization-in-mailbox-endpoint  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-17. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-75044 · Severity: high · CVSS 8.1 · Published 2026-08-17

JetBrains YouTrack is a project management and issue tracking system used by development teams to plan and track work. An authentication bypass flaw allows authenticated users to delete arbitrary data through the mailbox endpoint, potentially causing data loss and disruption to project management operations.

Technologies: [Jetbrains YouTrack](https://junglewise.ai/threats/technologies/youtrack). Vendors: [Jetbrains](https://junglewise.ai/threats/vendors/jetbrains).

## Quick answers

**Is CVE-2026-75044 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-75044 being exploited in the wild.

**How severe is CVE-2026-75044?** High severity, with a CVSS score of 8.1, published 17 August 2026.

**Which products and versions are affected?** Jetbrains YouTrack before 2025.3.156085, 2026.1.13914, 2026.2.18095.

**Is there a fix for CVE-2026-75044?** A patch was published on 2026-08-17: Fixes available in versions 2025.3.156085, 2026.1.13914, 2026.2.18095 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-75044 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-75044?** Check whether you run Jetbrains YouTrack at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a missing authorization (insecure direct object reference / IDOR) flaw in the YouTrack mailbox endpoint. An authenticated user can bypass authorization checks to delete arbitrary entities beyond their intended permissions. The attack requires valid authentication credentials but does not require additional user interaction or network-level access beyond standard HTTP requests. An attacker can cause data loss and operational disruption by deleting critical project data. Patches are available in YouTrack versions 2025.3.156085, 2026.1.13914, and 2026.2.18095 or later.

## Affected products

- JetBrains YouTrack before 2025.3.156085, 2026.1.13914, 2026.2.18095

## Timeline

- 2026-08-17: disclosed
- 2026-08-17: patched: Fixes available in versions 2025.3.156085, 2026.1.13914, 2026.2.18095

## References

- [https://www.jetbrains.com/privacy-security/issues-fixed/](https://www.jetbrains.com/privacy-security/issues-fixed/)

## Related threats

- [JetBrains YouTrack missing authorization in VCS hosting configuration](https://junglewise.ai/threats/cve-2026-123332-in-jetbrains-youtrack-before-2026-2-19562-missing-authorization)
- [JetBrains YouTrack article visibility restriction bypass](https://junglewise.ai/threats/cve-2026-123331-in-jetbrains-youtrack-before-2026-2-19197-article-editors-could)
- [JetBrains YouTrack missing authorization in issue visibility settings](https://junglewise.ai/threats/cve-2026-123330-in-jetbrains-youtrack-before-2026-2-19562-missing-authorization)
- [JetBrains YouTrack missing authorization in TeamCity integration](https://junglewise.ai/threats/cve-2026-123329-in-jetbrains-youtrack-before-2026-2-19562-missing-authorization)
- [JetBrains YouTrack app permission bypass privilege escalation](https://junglewise.ai/threats/cve-2026-123328-in-jetbrains-youtrack-before-2026-2-19656-app-permission-bypass)