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

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00367.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
JetBrains YouTrack unaffected
Version Status Constraints
0 affected < 2026.2.19197

Configuration 1 [-]

cpe:2.3:a:jetbrains:youtrack:*:*:*:*:*:*:*:*

No data.

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Vendors Products
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Youtrack Subscribe

Project Subscriptions

Vendors Products
Jetbrains Subscribe
Youtrack Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.jetbrains.com/privacy-security/issues-fixed/ cve-icon cve-icon
History

Thu, 01 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:jetbrains:youtrack:*:*:*:*:*:*:*:*

Thu, 01 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
First Time appeared Jetbrains
Jetbrains youtrack
Vendors & Products Jetbrains
Jetbrains youtrack

Wed, 30 Sep 2026 17:15:00 +0000

Type Values Removed Values Added
Title Regular Expression Denial of Service via Mailbox Rule Filters in JetBrains YouTrack

Wed, 30 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Description In JetBrains YouTrack before 2026.2.19197 reDoS attack was possible via mailbox regex mail-rule filters
Weaknesses CWE-1333
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: JetBrains

Published:

Updated: 2026-09-30T15:48:39.085Z

Reserved: 2026-09-25T17:02:07.268Z

Link: CVE-2026-100267

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2026-09-30T16:16:57.853

Modified: 2026-10-01T15:25:01.563

Link: CVE-2026-100267

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T00:15:14Z

Weaknesses