CVE-2026-75054

Internal resource access via preview proxy

Published Aug 17, 2026 · Updated Aug 17, 2026

Server-side request forgery in JetBrains IntelliJ IDEA before 2026.2.1 allows attackers to access internal resources via OpenAPI previews. JetBrains attributes the flaw to the OpenAPI preview proxy in untrusted projects, but public records do not disclose the exact request-handling mistake or attacker-controlled field that lets preview data steer outbound requests. Exploitation requires a user to open an untrusted project, after which the IDE can be induced to send requests from the local host toward otherwise unreachable internal services; no integrity or availability impact has been published.

CVSS severity6.3
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in JetBrains IntelliJ IDEA before 2026.2.1 allows attackers to access internal resources via OpenAPI previews. JetBrains attributes the flaw to the OpenAPI preview proxy in untrusted projects, but public records do not disclose the exact request-handling mistake or attacker-controlled field that lets preview data steer outbound requests. Exploitation requires a user to open an untrusted project, after which the IDE can be induced to send requests from the local host toward otherwise unreachable internal services; no integrity or availability impact has been published.

The record

CVE
CVE-2026-75054
Published
Aug 17, 2026
Updated
Aug 17, 2026
Vendor
JetBrains
Product
IntelliJ IDEA
Classifications
CWE-918
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 17, 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 <2026.2.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

JetBrains · IntelliJ IDEAversion=0 <2026.2.1

Published CVSS scores

6.3JetBrains s.r.o.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

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.

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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-918Server-Side Request Forgery (SSRF)

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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