CVE-2026-123839: JetBrains IntelliJ IDEA · Insufficient UI Warning of Dangerous Operations
Affects JetBrains IntelliJ IDEASource CVE Database V5
Not known to be exploited · CVSS 4.7 Medium : upgrade to 2026.3 when convenient.
Data as of 6 Nov 2026, 16:34 UTC
Thin evidence
One scorer or none| CNA (JetBrains) | CVSS 3.1 | 4.7 |
|---|
- Patch
- Available – fixed in 2026.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 6 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 6 Nov 2026.
What to do
Upgrade JetBrains IntelliJ IDEA to 2026.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| JetBrainsIntelliJ IDEA | Affected
| Fixed in
|
Description
In JetBrains IntelliJ IDEA before 2026.3 opening arbitrary URLs without confirmation was possible via the Remote Development port forwarding model