CyberSecBulletin
CVE-2026-118697NVD status: Awaiting Analysis

Toolbox App: Improper Certificate Validation

Published Updated By the CyberSecBulletin desk

CVE-2026-118697 is a critical-severity improper certificate validation vulnerability in Toolbox App from JetBrains, with a CVSS 3.1 base score of 9.0 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 3.9.1, 3.8.2 as the first without the flaw, so updating Toolbox App to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.29% chance of exploitation within 30 days, which is low compared with other CVEs.

Patch this week

Critical severity: a successful attack would have severe impact.

What to do

  1. Update Toolbox App to 3.9.1 or 3.8.2, whichever matches your release line, or a later version.
  2. Update IntelliJ IDEA to 2026.2.4 or a later version.
  3. Update PyCharm to 2026.2.4 or a later version.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
JetBrainsToolbox App3.9 up to, but not including, 3.9.1; before 3.8.23.9.1, 3.8.2
JetBrainsIntelliJ IDEAbefore 2026.2.42026.2.4
JetBrainsPyCharmbefore 2026.2.42026.2.4
JetBrainsPhpStormbefore 2026.2.42026.2.4
JetBrainsRubyMinebefore 2026.2.42026.2.4
JetBrainsWebStormbefore 2026.2.42026.2.4
JetBrainsGoLandbefore 2026.2.42026.2.4
JetBrainsRiderbefore 2026.2.42026.2.4
JetBrainsCLionbefore 2026.2.4.12026.2.4.1
JetBrainsDataGripbefore 2026.2.6.12026.2.6.1
JetBrainsRustRoverbefore 2026.2.52026.2.5

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
HighSuccess depends on conditions outside the attacker's control.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
ChangedThe attack can reach beyond the vulnerable component into other systems.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H. Scored by CNA (jetbrains.com).

Official description

In JetBrains Toolbox App before 3.9.1 and 3.8.2; IntelliJ IDEA, PyCharm, PhpStorm, RubyMine, WebStorm, GoLand and Rider before 2026.3 and 2026.2.4; CLion before 2026.3 and 2026.2.4.1; DataGrip before 2026.3 and 2026.2.6.1; RustRover before 2026.3 and 2026.2.5, the jetbrainsd daemon trusted compromised intermediate certificates

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate.

How developers prevent this class of flaw

  • Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
  • If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.

More Improper Certificate Validation vulnerabilities (CWE-295)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Improper Certificate Validation vulnerabilities

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