CVE-2026-118697 JetBrains Toolbox App & IntelliJ IDEA - Trust Bypass

JetBrains Toolbox App < 3.9.1 and 3.8.2, IntelliJ IDEA < 2026.3 and 2026.2.4 contain a trust bypass caused by jetbrainsd daemon trusting compromised intermediate certificates, letting attackers bypass certificate validation, exploit requires attacker to present compromised intermediate certificates.

CVSS base score 9.0 /10
Critical
CISA KEV
Not listed
Public exploit
None known
EPSS
0.27% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Trust Bypass
Impact
Man In The Middle
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
30 October 2026
Updated
1 November 2026
Weakness
CWE-295

Vendor fix

Update to JetBrains Toolbox App 3.9.1 or later and IntelliJ IDEA 2026.3 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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