CVE-2026-123844
In JetBrains IntelliJ IDEA before 2026.3 sSRF was possible via custom plugin repositories
In JetBrains IntelliJ IDEA before 2026.3 sSRF was possible via custom plugin repositories
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
In JetBrains IntelliJ IDEA before 2026.3 sSRF was possible via custom plugin repositories
- Record
CVE-2026-123844- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-06
EUVDEUVD-2026-118347
In JetBrains IntelliJ IDEA before 2026.3 sSRF was possible via custom plugin repositories
- Record
EUVD-2026-118347- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N - Updated
- 2026-11-06
GitHub AdvisoriesGHSA-36hr-rxj9-g4xm
In JetBrains IntelliJ IDEA before 2026.3 sSRF was possible via custom plugin repositories
In JetBrains IntelliJ IDEA before 2026.3 sSRF was possible via custom plugin repositories
- Record
GHSA-36hr-rxj9-g4xm- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-06
NVD
In JetBrains IntelliJ IDEA before 2026.3 sSRF was possible via custom plugin repositories
- Record
CVE-2026-123844- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N - Weakness
- CWE-918
- Updated
- 2026-11-06
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| published | EUVD | |
| published | EUVD, NVD | |
| aliases, references, title | EUVD, GitHub Advisories | |
| cwes, severity | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-123844 is a medium vulnerability (CVSS 5.3) in Jetbrains Intellij Idea, published November 6, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 19th percentile. No source names a fixed version.