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CVE-2026-123311

5.3 mediumEPSS 0.1%

Medium (5.3) in jetbrains intellij idea. EPSS 0.1% estimated probability of exploitation activity in the next 30 days.

On this page
In JetBrains IntelliJ IDEA before 2026.3, 2026.2.4 command execution via a hidden run control in the Markdown preview was possible

Severity

CVSS 3.1

5.3 medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N
EPSS
0.1% estimated probability of exploitation activity in the next 30 days; 3rd percentile. Scored 2026-11-10. A forecast for this CVE across the internet, not for your own systems.
CISA's assessment (SSVC)
Exploitation: none · Automatable: no · Technical impact: total, assessed 2026-11-06. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
CWE
CWE-1021 Improper Restriction of Rendered UI Layers or Frames
OWASP Top 10
A06:2025 Insecure Design
Published
Modified
NVD analysis
Awaiting analysis
Record from
the NVD, synced

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Affected

  • jetbrains:intellij idea

Versions

From the CNA's record in the CVE List.

ProductAffected
JetBrains IntelliJ IDEAbefore 2026.3, 2026.2.4

Attack patterns (CAPEC)

  • CAPEC-103 Clickjacking Likelihood: Medium · Severity: High
  • CAPEC-181 Flash File Overlay Severity: Medium
  • CAPEC-222 iFrame Overlay Likelihood: Medium · Severity: High
  • CAPEC-504 Task Impersonation Likelihood: Medium · Severity: High
  • CAPEC-506 Tapjacking Likelihood: Low · Severity: Low
  • CAPEC-587 Cross Frame Scripting (XFS) Severity: High
  • CAPEC-654 Credential Prompt Impersonation Likelihood: Medium · Severity: High

The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.

References

Check your stackJSON