In JetBrains Datalore before 2026.4 improper owner validation allowed reading another workspace's issues and runs
Source GCVE Database
Not known to be exploited · CVSS 4.3 Medium : upgrade to 2026.4 when convenient.
Data as of 6 Nov 2026, 13:47 UTC
Thin evidence
One scorer or none| CNA (JetBrains) | CVSS 3.1 | 4.3 |
|---|
- Patch
- Available – fixed in 2026.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 6 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.
What to do
Upgrade Datalore to 2026.4.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| JetBrainsDatalore | Affected
| Fixed in
|
AI-suggested
If you cannot patch yet, restrict user privileges to minimize exposure and monitor access controls carefully.
Description
A vulnerability in JetBrains Datalore before version 2026.4 allows improper owner validation, which enables unauthorized users with limited privileges to read issues and runs from other workspaces. This flaw does not allow modification or denial of service but exposes some confidential information across workspace boundaries.