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VulnerabilityPublished

CVE-2026-123313: JetBrains IntelliJ IDEA · Untrusted Functionality Inclusion

Affects JetBrains IntelliJ IDEASource CVE Database V5

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Not known to be exploited · CVSS 3.3 Low : upgrade to 2026.3 when convenient.

Data as of 6 Nov 2026, 11:02 UTC

CVSS 3.1 base score
3.3Low
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (JetBrains)CVSS 3.13.3
Patch
Available – fixed in 2026.3
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade JetBrains IntelliJ IDEA to 2026.3.

Affected software

ProductAffectedFixed in
JetBrainsIntelliJ IDEAAffected
  • <2026.3
Fixed in
  • 2026.3

AI-suggested

Upgrade to JetBrains IntelliJ IDEA version 2026.3 or later, where this vulnerability is fixed. No other mitigation is indicated or required by the vendor advisory.

Description

CVE-2026-123313 is a vulnerability in JetBrains IntelliJ IDEA before version 2026.3 where improper checks could allow disabled plugins to be enabled via external dependency settings. This flaw relates to the inclusion of functionality from an untrusted control sphere, classified under CWE-829. The issue has a low CVSS score of 3.3 and does not impact confidentiality or availability but can cause limited integrity issues. The vulnerability is fixed in version 2026.3.

References

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