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Vulnerabilities

Vulnerability · CVE-2026-111091

In JetBrains Junie CLI before 26.8.3 code execution was possible via an untrusted project's MCP server configuration

Published Oct 15, 2026 · catalog updated Oct 15, 2026 · In JetBrains Junie CLI

Check if you run it

No confirmed exploitation is on record for CVE-2026-111091. EPSS is 0.14%. Act only if a listed version of In JetBrains Junie CLI is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (In JetBrains Junie CLI).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.14%
Remediation
Advisory link
Affected products
See sources for product scope

In JetBrains Junie CLI before 26.8.3 code execution was possible via an untrusted project's MCP server configuration

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-111091

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-111091. EPSS is 0.14%. Act only if a listed version of In JetBrains Junie CLI is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-829: Inclusion of Functionality from Untrusted Control Sphere. EPSS 0.14%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 15, 2026 · NIST NVD

    Detected

    In JetBrains Junie CLI before 26.8.3 code execution was possible via an untrusted project's MCP server configuration

  2. Oct 15, 2026 · NIST NVD

    Updated

    In JetBrains Junie CLI before 26.8.3 code execution was possible via an untrusted project's MCP server configuration

Sources

  • CVE.orgVulnerability recordCVE-2026-111091

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-111091

    30-day exploitation probability 0.1%

    first.org
  • NIST NVDVulnerability recordCVE-2026-111091

    In JetBrains Junie CLI before 26.8.3 code execution was possible via an untrusted project's MCP server configuration

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.