CVE-2026-123320 json
In JetBrains Toolbox App before 3.9 insufficient warning in the login dialog allowed connecting to a malicious server
published 3d ago modified 3d ago also EUVD-2026-118084
- cvss
- 3.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 3%
- public exploits
- 0
- none known
Summary
In JetBrains Toolbox App before 3.9 insufficient warning in the login dialog allowed connecting to a malicious server
Patch / fix
- JetBrains Toolbox App 3.9
Is CVE-2026-123320 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N |
Affected products
- JetBrains Toolbox App
Classification
- Weakness
-
- CWE-357 Insufficient UI Warning of Dangerous Operations
References
Sources
- CVE List CVE-2026-123320
- NVD CVE-2026-123320
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.