CVE-2026-123282: JetBrains Datalore · Operation on a Resource after Expiration or Release
Affects JetBrains DataloreSource CVE Database V5
Not known to be exploited · CVSS 7.4 High : upgrade to 2026.4 soon.
Data as of 6 Nov 2026, 11:04 UTC
Thin evidence
One scorer or none| CNA (JetBrains) | CVSS 3.1 | 7.4 |
|---|
- Patch
- Available – fixed in 2026.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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 5 Nov 2026.
What to do
Upgrade JetBrains Datalore to 2026.4.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| JetBrainsDatalore | Affected
| Fixed in
|
AI-suggested
Upgrade JetBrains Datalore to version 2026.4 or later, where the vulnerability has been fixed. No additional mitigation is required once the official fix is applied.
Description
JetBrains Datalore versions before 2026.4 contain a vulnerability where account tokens lack proper expiration validation. This flaw allows an attacker to establish a new authenticated session using expired tokens. The issue is classified under CWE-672, indicating operations on resources after expiration or release. The vulnerability has a high severity with a CVSS score of 7.4 and affects versions prior to 2026.4. JetBrains has fixed this issue in version 2026.4.