YouTrack: Allocation of Resources Without Limits or Throttling (CVE-2026-100274)

What is affected, what to do

In JetBrains YouTrack before 2026.2.19197 project Admin could trigger DoS via a notification template

Update JetBrains YouTrack to version 2026.2.19197.

Affected

• JetBrains YouTrack lt *..2026.2.19197

Fixed in

• JetBrains YouTrack 2026.2.19197

Not sure whether and how you are affected? Ask a question about this vulnerability

Metrics

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2

NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

Read in glossary

Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.

CRA

The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

Read in glossary

From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.

ISO/IEC 27001

ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

Read in glossary

Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

In JetBrains YouTrack before 2026.2.19197 project Admin could trigger DoS via a notification template

Source: BSI WID Portal

Vendors and products

• JetBrains You Track
• JetBrains JetBrains YouTrack

Weakness classes (CWE)

• CWE-770Allocation of Resources Without Limits or Throttling

  Base

  The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

  Entry at MITRE CWE-770

References & sources

• jetbrains.comprivacy-security/issues-fixed

Changes to this CVE

Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

1. 02.10.2026Initial analysis by NVDNVD

   Newly listed as affected:

   • JetBrains YouTrack (before 2026.2.19197)

   New references:

   • https://www.jetbrains.com/privacy-security/issues-fixed/
   Show 2 original changes

   Individual changes of this event as published by NVD

   Type	Action	Before	After
   Product configuration	added	—	OR *cpe:2.3:a:jetbrains:youtrack:*:*:*:*:*:*:*:* versions up to (excluding) 2026.2.19197
   Reference type	added	—	JetBrains s.r.o.: https://www.jetbrains.com/privacy-security/issues-fixed/ Types: Vendor Advisory

   Source identifier: nvd@nist.gov

2. 30.09.2026Receivedjetbrains.com

   CVSS V3.1: AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

   Weakness type: CWE-770

   Description added or changed

   New references:

   • https://www.jetbrains.com/privacy-security/issues-fixed/
   Show 5 original changes

   Individual changes of this event as published by NVD

   Type	Action	Before	After
   Description	added	—	In JetBrains YouTrack before 2026.2.19197 project Admin could trigger DoS via a notification template
   CVSS	added	—	AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
   Weakness type (CWE)	added	—	CWE-770
   Affected versions (publisher)	added	—	New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/100xxx/CVE-2026-100274.json">CVE-2026-100274</a>
   Reference	added	—	https://www.jetbrains.com/privacy-security/issues-fixed/

   Source identifier: cve@jetbrains.com

3. 30.09.2026Record modifiedCISA ADP

   CISA assessment (SSVC): exploitation: none known, automatable: no

   Show the original change

   Individual changes of this event as published by NVD

   Type	Action	Before	After
   SSVC assessment	added	—	{"id":"CVE-2026-100274","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-09-30T15:32:04.675176Z"}

   Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0