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TI-2026-86003 Aliases CVE-2026-123844GHSA-36hr-rxj9-g4xm

Server-side request forgery in JetBrains IntelliJ IDEA via plugin repositories

Priority LOW 24CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

JetBrains IntelliJ IDEA before 2026.3 is affected. A server-side request forgery (CWE-918) lets a remote attacker make the IDE send requests to hosts of the attacker's choosing through custom plugin repositories. The attack needs user interaction, and the impact is high confidentiality loss.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

In JetBrains IntelliJ IDEA before 2026.3 sSRF was possible via custom plugin repositories

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00273 19th percentileScored 2026-11-07
Fix Fixed IntelliJ IDEA (JetBrains): 2026.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JetBrainsIntelliJ IDEAbefore 2026.32026.3Patch availableCNA
  • IntelliJ IDEA VendorJetBrains Affected before 2026.3 Fixed in 2026.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:jetbrains:intellij_idea:*:*:*:*:*:*:*:*——JetBrains
  • cpe:2.3:a:jetbrains:intellij_idea:*:*:*:*:*:*:*:* Versions — — ·JetBrains

Remediation

Update JetBrains IntelliJ IDEA to version 2026.3 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA IntelliJ IDEA (JetBrains) Fixed in 2026.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    JetBrains IntelliJ IDEA 2026.3

    21 records Highest priority Priority LOW 21 LOW

    Other records, highest priority first

    • TI-2026-86000 Code execution via symlinks in IntelliJ IDEA settings archive importPriority LOW 35
    • TI-2026-85997 Code execution in JetBrains IntelliJ IDEA Safe Mode via UI DesignerPriority LOW 35
    • TI-2026-85846 Path traversal in JetBrains IntelliJ IDEA via Dev Container archivesPriority LOW 35
    Show all 21 records →

Timeline

  1. 2026-11-06 Threatist record created from CVE-2026-123844
  2. 2026-11-06 CISA SSVC decision points changed
  3. 2026-11-06 Alias added: GHSA-36hr-rxj9-g4xm

References

Other 1

  • TI-2026-45031 Deserialization of untrusted data in JetBrains TeamCity KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18053 In JetBrains TeamCity before 2023.11.4 authentication bypass allowing to perform admin actions was possible KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-22884 In JetBrains TeamCity before 2023.05.4 authentication bypass leading to RCE on TeamCity Server was possible KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18054 In JetBrains TeamCity before 2023.11.4 path traversal allowing to perform limited admin actions was possible KEVCVSS 3.1HIGH 7.3
  • TI-2024-15905 In JetBrains TeamCity before 2023.11.3 authentication bypass leading to RCE was possible CVSS 3.1CRITICAL 9.8
  • TI-2024-24589 Insufficiently protected credentials in JetBrains IntelliJ IDEA CVSS 3.1CRITICAL 9.3
See all 787 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences