CVE-2026-49383

Local file disclosure via UI form XXE

Published May 29, 2026 · Updated May 29, 2026

XXE in the UI Designer form parser in JetBrains IntelliJ IDEA before 2026.1 allows local users to read files through a crafted form. The parser resolves attacker-supplied external entity references from XML form content, exposing referenced local resources when the form is processed. Exploitation requires an affected user to open the crafted file locally; published evidence reports file disclosure but no write, code-execution, or service-interruption impact.

CVSS severity3.3
Low
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

XXE in the UI Designer form parser in JetBrains IntelliJ IDEA before 2026.1 allows local users to read files through a crafted form. The parser resolves attacker-supplied external entity references from XML form content, exposing referenced local resources when the form is processed. Exploitation requires an affected user to open the crafted file locally; published evidence reports file disclosure but no write, code-execution, or service-interruption impact.

The record

CVE
CVE-2026-49383
Published
May 29, 2026
Updated
May 29, 2026
Vendor
JetBrains
Product
IntelliJ IDEA
Classifications
CWE-611, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <2026.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

JetBrains · IntelliJ IDEAversion=0 <2026.1

Published CVSS scores

3.3JetBrains s.r.o.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/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.

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-611Improper Restriction of XML External Entity Reference
T1204.002User Execution: Malicious 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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo