Is there a public exploit for CVE-2026-123311?

No public exploit for CVE-2026-123311 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-123311?

CVE-2026-123311 scores CVSS 5.3 (v3.1), rated medium.

What does CVE-2026-123311 affect?

CVE-2026-123311 affects JetBrains IntelliJ IDEA.

5.3 Medium

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

CVE-2026-123311

Assessment

CVSS: 5.3 (v3.1)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 6 November 2026
Last updated: 6 November 2026
Affected: JetBrains · IntelliJ IDEA
Assigner: JetBrains

CVSS vectorCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N

At the source

EUVD (ENISA)

References

https://www.jetbrains.com/privacy-security/issues-fixed/

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