CVE-2026-86504

Host code execution via unchecked Dev Container build

Published Sep 7, 2026 · Updated Sep 9, 2026

Code execution in JetBrains IntelliJ IDEA before 2026.2.2 allows context-dependent attackers to run code on the host via a Dev Container build. The Dev Container build path omits project-trust confirmation before consuming the untrusted project's devcontainer.json instructions. Exploitation requires a user to open an untrusted project and start its Dev Container build, after which attacker-controlled code runs on the host.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in JetBrains IntelliJ IDEA before 2026.2.2 allows context-dependent attackers to run code on the host via a Dev Container build. The Dev Container build path omits project-trust confirmation before consuming the untrusted project's devcontainer.json instructions. Exploitation requires a user to open an untrusted project and start its Dev Container build, after which attacker-controlled code runs on the host.

The record

CVE
CVE-2026-86504
Published
Sep 7, 2026
Updated
Sep 9, 2026
Vendor
JetBrains
Product
IntelliJ IDEA
Classifications
CWE-829, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2026.2.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

JetBrains · IntelliJ IDEAversion=0 <2026.2.2

Published CVSS scores

7.8JetBrainsCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-829Inclusion of Functionality from Untrusted Control Sphere
T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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