CVE-2026-22013Network attack vector

Unauthenticated disclosure of Java-accessible data

Published Apr 21, 2026 · Updated Apr 21, 2026

Information disclosure in Oracle Java SE and GraalVM JGSS allows remote attackers to read Java-accessible data through multiple protocols. Oracle has not published the defective JGSS operation or how untrusted input bypasses the sandbox's protection mechanism. Exploitation requires user interaction and a client deployment that loads untrusted code in a sandbox; servers running only administrator-installed code are outside scope.

CVSS severity5.3
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Oracle Java SE and GraalVM JGSS allows remote attackers to read Java-accessible data through multiple protocols. Oracle has not published the defective JGSS operation or how untrusted input bypasses the sandbox's protection mechanism. Exploitation requires user interaction and a client deployment that loads untrusted code in a sandbox; servers running only administrator-installed code are outside scope.

The record

CVE
CVE-2026-22013
Published
Apr 21, 2026
Updated
Apr 21, 2026
Vendor
Oracle Corporation
Product
Oracle GraalVM for JDK
Classifications
CWE-693, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 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=17.0.18
  2. Affected versionversion=21.0.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle GraalVM for JDKversion=17.0.18; version=21.0.10
Oracle Corporation · Oracle GraalVM Enterprise Editionversion=21.3.17
Oracle Corporation · Java Platform, Standard Edition (Java SE)version=11.0.30; version=17.0.18; version=21.0.10; version=25.0.2; version=26; version=8u481; version=8u481-b50; version=8u481-perf

Published CVSS scores

5.3Oracle CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/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.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
T1005Data from Local System

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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