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CVE-2026-123856VulnerabilityPublished

In JetBrains Toolbox App before 3.6.1 nTLM hash disclosure was possible via SVG tool icons from a Remote Development

Source GCVE Database

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Authoritative record:CVE-2026-123856· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium : upgrade to 3.6.1 when convenient.

Data as of 6 Nov 2026, 19:05 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (JetBrains)CVSS 3.16.5
Patch
Available – fixed in 3.6.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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 6 Nov 2026.

What to do

Upgrade Toolbox App to 3.6.1.

Affected software

ProductAffectedFixed in
JetBrainsToolbox AppAffected
  • <3.6.1
Fixed in
  • 3.6.1

AI-suggested

The vulnerability affects versions before 3.6.1. Users should upgrade to version 3.6.1 or later where the issue is fixed. Until upgraded, avoid loading SVG icons from untrusted Remote Development servers.

Description

JetBrains Toolbox App versions before 3.6.1 contain a vulnerability that allows NTLM hash disclosure via SVG tool icons loaded from a Remote Development server. This issue could expose sensitive authentication hashes to remote attackers. The vulnerability has a CVSS score of 6.5, indicating a medium severity level.

References

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