JetBrains IntelliJ IDEA up to 2026.2 JSON Schema Validation server-side request forgery

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.42

Summaryinfo

A vulnerability described as problematic has been identified in JetBrains IntelliJ IDEA up to 2026.2. Affected by this issue is some unknown functionality of the component JSON Schema Validation. The manipulation results in server-side request forgery. This vulnerability is reported as CVE-2026-123846. The attack can be launched remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in JetBrains IntelliJ IDEA up to 2026.2. Affected is an unknown code block of the component JSON Schema Validation. The manipulation with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality. CVE summarizes:

In JetBrains IntelliJ IDEA before 2026.3 blind SSRF was possible via remote references in JSON Schema validation

The advisory is available at jetbrains.com. This vulnerability is traded as CVE-2026-123846 since 11/06/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

Upgrading to version 2026.3 eliminates this vulnerability.

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Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (JetBrains): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: IntelliJ IDEA 2026.3

Timelineinfo

11/06/2026 Advisory disclosed
11/06/2026 +0 days CVE reserved
11/06/2026 +0 days VulDB entry created
11/06/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: jetbrains.com
Status: Confirmed

CNA: JetBrains
CVE: CVE-2026-123846 (🔒)

GCVE (CVE): GCVE-0-2026-123846
GCVE (VulDB): GCVE-100-431982

Entryinfo

Created: 11/06/2026 17:30
Changes: 11/06/2026 17:30 (63)
Complete: 🔍
Cache ID: 216::103

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