JetBrains CLion prior 2026.3/2026.2.4.1 GDB Server Debug Profile code injection

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.86+

Summaryinfo

A vulnerability classified as problematic was found in JetBrains CLion. Affected by this vulnerability is an unknown functionality of the component GDB Server Debug Profile. Such manipulation leads to code injection. This vulnerability is documented as CVE-2026-123276. The attack needs to be performed locally. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in JetBrains CLion and classified as problematic. Affected by this issue is an unknown function of the component GDB Server Debug Profile. The manipulation with an unknown input leads to a code injection vulnerability. Using CWE to declare the problem leads to CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In JetBrains CLion before 2026.3, 2026.2.4.1 code execution was possible in Safe Mode via a crafted GDB server debug profile

The advisory is shared for download at jetbrains.com. This vulnerability is handled as CVE-2026-123276 since 11/05/2026. The exploitation is known to be easy. The attack needs to be approached locally. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.

Upgrading to version 2026.3 or 2026.2.4.1 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.2

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (JetBrains): 🔒

CVSSv2info

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

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

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: CLion 2026.3/2026.2.4.1

Timelineinfo

11/05/2026 CVE reserved
11/06/2026 +1 days Advisory disclosed
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-2026-123276 (🔒)

GCVE (CVE): GCVE-0-2026-123276
GCVE (VulDB): GCVE-100-431816

Entryinfo

Created: 11/06/2026 11:49
Changes: 11/06/2026 11:49 (62)
Complete: 🔍
Cache ID: 216::103

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