Quick answers
- Is CVE-2026-75048 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-75048 being exploited in the wild.
- How severe is CVE-2026-75048?
- High severity, with a CVSS score of 8.2, published 17 August 2026.
- Which products and versions are affected?
- Jetbrains YouTrack before 2026.2.18068.
- Is there a fix for CVE-2026-75048?
- A patch was published on 2026-02-18: Fixed in version 2026.2.18068 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-75048 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-75048?
- 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
This is a stored XSS vulnerability (CWE-79) in YouTrack's markdown/rich-text rendering engine, specifically in how fenced code-block language labels are processed and sanitized. The vulnerability allows an attacker to inject arbitrary JavaScript into the language label parameter of code blocks (e.g., ```[PAYLOAD]). Because the payload is stored server-side and reflected to all users viewing the affected issue or comment, no user interaction beyond normal viewing is required. An authenticated user with permission to create or edit issues/comments can exploit this to execute JavaScript in the browser context of any other user who reads the content. The vulnerability was patched in version 2026.2.18068.
Affected products
- JetBrains YouTrack before 2026.2.18068
Timeline
- 2026-08-17: disclosed
- 2026-02-18: patched: Fixed in version 2026.2.18068