CVE-2026-83357Network attack vector

Unauthenticated takeover through undisclosed compiler flaw

Published Sep 15, 2026 · Updated Sep 15, 2026

Compiler flaw in Oracle GraalVM for JDK 17 23.0.13.1 and JDK 21 23.1.12.1 allows remote attackers to take over the runtime via HTTP. Oracle identifies the affected locus only as the Compiler component and has not published the incorrect operation it performs on untrusted HTTP input. Exploitation requires no credentials or user interaction, but has high attack complexity and compromises confidentiality, integrity, and availability.

CVSS severity8.1
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Compiler flaw in Oracle GraalVM for JDK 17 23.0.13.1 and JDK 21 23.1.12.1 allows remote attackers to take over the runtime via HTTP. Oracle identifies the affected locus only as the Compiler component and has not published the incorrect operation it performs on untrusted HTTP input. Exploitation requires no credentials or user interaction, but has high attack complexity and compromises confidentiality, integrity, and availability.

The record

CVE
CVE-2026-83357
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Oracle Corporation
Product
Oracle GraalVM for JDK
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=Oracle GraalVM:25.0.4.1
  2. Affected versionversion=Oracle GraalVM for JDK 17:23.0.13.1
  3. Affected versionversion=Oracle GraalVM for JDK 21:23.1.12.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle Corporation · Oracle GraalVM for JDKversion=Oracle GraalVM:25.0.4.1; version=Oracle GraalVM for JDK 17:23.0.13.1; version=Oracle GraalVM for JDK 21:23.1.12.1

Published CVSS scores

8.1Oracle CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

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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