---
id: CVE-2026-100267
title: >-
  In JetBrains YouTrack before 2026.2.19197 reDoS attack was possible via
  mailbox regex mail-rule filters
summary: >-
  In JetBrains YouTrack before 2026.2.19197 reDoS attack was possible via
  mailbox regex mail-rule filters
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-1333
vendor: jetbrains
product: youtrack
affected:
  - youtrack < 2026.2.19197
patched:
  - youtrack 2026.2.19197
published: '2026-09-30'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T15:25:01.563'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-100267'
references:
  - url: 'https://www.jetbrains.com/privacy-security/issues-fixed/'
    label: cve@jetbrains.com
tags:
  - nvd
  - cve.org
epss: 0.00286
epssPercentile: 0.21023
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-30T15:34:30.966300Z'
ingestedAt: '2026-09-30T16:10:07.716Z'
---

## Overview

In JetBrains YouTrack before 2026.2.19197 reDoS attack was possible via mailbox regex mail-rule filters

## Affected

- `youtrack < 2026.2.19197`

## Remediation

Upgrade past the affected range:

- `youtrack 2026.2.19197`