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VulnerabilityPublished

CVE-2026-123298: JetBrains Hub · CRLF Injection

Affects JetBrains HubSource CVE Database V5

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Not known to be exploited · CVSS 5.0 Medium : upgrade to 2026.2.52556 when convenient.

Data as of 6 Nov 2026, 11:03 UTC

CVSS 3.1 base score
5.0Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (JetBrains)CVSS 3.15.0
Patch
Available – fixed in 2026.2.52556
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 Hub to 2026.2.52556.

Affected software

ProductAffectedFixed in
JetBrainsHubAffected
  • <2026.2.52556
Fixed in
  • 2026.2.52556

AI-suggested

Upgrade JetBrains Hub to version 2026.2.52556 or later, where this vulnerability is fixed. No other mitigation or workaround is indicated by the vendor advisory.

Description

CVE-2026-123298 is a CRLF injection vulnerability in JetBrains Hub versions before 2026.2.52556. It allows SMTP command injection via the email verification feature. The vulnerability has been assigned a medium severity with a CVSS score of 5. A fix is available in version 2026.2.52556.

References

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