---
cve: "CVE-2026-100275"
severity: "MEDIUM"
cvss: 6.9
epss: "0.2%"
vendor: "JetBrains"
kev: false
exploited: false
published: "2026-09-30 16:16:59"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-29T17:59:06+01:00"
---

# CVE-2026-100275

> 6.9 MEDIUM

## Beschreibung

In JetBrains YouTrack before 2026.2.19197 stored XSS in the workflow error notification toast was possible

## CNA-Record (Kanon, cvelistV5)

- CNA: **JetBrains**
- State: PUBLISHED
- Stand: 2026-09-30 15:48:37
- CNA-CVSS: **6.9** (`CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Hoch | good |
| UI Interaktion | Erforderlich | good |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Schwachstellen-Klasse

- **CWE-79** — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
  The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

## Angriffsmuster (CAPEC)

- [CAPEC-63 — Cross-Site Scripting (XSS)](https://capec.mitre.org/data/definitions/63.html) _(Severity: Very High)_
- [CAPEC-85 — AJAX Footprinting](https://capec.mitre.org/data/definitions/85.html) _(Severity: Low)_
- [CAPEC-209 — XSS Using MIME Type Mismatch](https://capec.mitre.org/data/definitions/209.html) _(Severity: Medium)_
- [CAPEC-588 — DOM-Based XSS](https://capec.mitre.org/data/definitions/588.html) _(Severity: Very High)_
- [CAPEC-591 — Reflected XSS](https://capec.mitre.org/data/definitions/591.html) _(Severity: Very High)_
- [CAPEC-592 — Stored XSS](https://capec.mitre.org/data/definitions/592.html) _(Severity: Very High)_

## BSI-Hinweise (deutsch)

- [JetBrains You Track: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-3696) — _BSI-Einstufung: hoch_
  Ein Angreifer kann mehrere Schwachstellen in JetBrains You Track ausnutzen, um Sicherheitsvorkehrungen zu umgehen um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen und um beliebigen Programmcode auszuführen.

## Referenzen

- <https://www.jetbrains.com/privacy-security/issues-fixed/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-100275/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_