CVE-2026-123306 json
In JetBrains IntelliJ IDEA before 2026.3 improper checks allowed server certificates to be added to the trust store during headless runs
published 3d ago modified 2d ago also EUVD-2026-118070
- cvss
- 7.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 10%
- public exploits
- 0
- none known
Summary
In JetBrains IntelliJ IDEA before 2026.3 improper checks allowed server certificates to be added to the trust store during headless runs
Patch / fix
- JetBrains IntelliJ IDEA 2026.3
Is CVE-2026-123306 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 FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 2d ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected products
- JetBrains IntelliJ IDEA
Classification
- Weakness
-
- CWE-295 Improper Certificate Validation
References
Sources
- CVE List CVE-2026-123306
- NVD CVE-2026-123306
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.