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TI-2026-85994 Aliases CVE-2026-123835GHSA-4xrh-853p-mr3w

JetBrains Datalore race condition runs code in other users' computations

Priority LOW 29CWE-367Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

JetBrains Datalore before 2026.4 has a time-of-check to time-of-use race condition (CWE-367) in its init script upload handling. The race lets code run inside another user's computation. An attacker with low privileges and network access can exploit it, with a high complexity requirement, to affect confidentiality and integrity.

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

Description from the CNA

In JetBrains Datalore before 2026.4 code execution was possible in another user's computation via an init script upload race condition

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00649 51st percentileScored 2026-11-07
Fix Fixed Datalore (JetBrains): 2026.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

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

Affected products

VendorProductAffected versionsFixed inStatusSource
JetBrainsDatalorebefore 2026.42026.4Patch availableCNA
  • Datalore VendorJetBrains Affected before 2026.4 Fixed in 2026.4 Patch available CNA

Remediation

Upgrade JetBrains Datalore to version 2026.4 or later.

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

  • Fix · CNA Datalore (JetBrains) Fixed in 2026.4

Fixed in the same release

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

  • Release ·

    JetBrains Datalore 2026.4

    15 records Highest priority Priority MEDIUM 1 MEDIUM, 14 LOW

    Other records, highest priority first

    • TI-2026-85995 Improper link resolution in JetBrains Datalore exposes SSH private keysPriority MEDIUM 40
    • TI-2026-85821 Incorrect authorization in JetBrains Datalore allows code execution by viewersPriority LOW 39
    • TI-2026-85993 Improper scope validation in JetBrains Datalore database tasksPriority LOW 35
    Show all 15 records →

Timeline

  1. 2026-11-06 Threatist record created from CVE-2026-123835
  2. 2026-11-06 CISA SSVC decision points changed
  3. 2026-11-06 Priority changed: MEDIUM → LOW
  4. 2026-11-06 Alias added: GHSA-4xrh-853p-mr3w

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