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TI-2026-06062 Aliases CVE-2026-6918

Out-of-bounds read in Eclipse OpenJ9

Priority HIGH 77CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.

Summary

In Eclipse Open9J versions 0.21 to 0.58, a pre-authentication remote attacker can crash JITServer by sending a 32-byte crafted TCP message.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00517 44th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Eclipse OpenJ9 (Eclipse Foundation): 0.59Red Hat: 1 advisory

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Eclipse FoundationEclipse OpenJ90.21 to before 0.590.59Patch availableCNA
  • Eclipse OpenJ9 VendorEclipse Foundation Affected 0.21 to before 0.59 Fixed in 0.59 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:eclipse:openj9:*:*:*:*:*:*:*:*0.21.0 to before 0.59.0VulnerableEclipse Foundation
  • cpe:2.3:a:eclipse:openj9:*:*:*:*:*:*:*:* Versions 0.21.0 to before 0.59.0 Vulnerable ·Eclipse Foundation

Remediation

  • Fix · CNA Eclipse OpenJ9 (Eclipse Foundation) Fixed in 0.59

Red Hat 1 advisory

  • RHSA-2026:22328 Released 2026-06-01 · Red Hat rating Important
    java-21-ibm-semeru-certified-jdk security update
    • Red Hat Enterprise Linux Supplementary (v. 10) java-21-ibm-semeru-certified-jdk-1:21.0.11.0.10-2.el10_1, java-21-ibm-semeru-certified-jdk-devel-1:21.0.11.0.10-2.el10_1, java-21-ibm-semeru-certified-jdk-headless-1:21.0.11.0.10-2.el10_1 +2
    • Red Hat Enterprise Linux Supplementary EUS (v. 10.0) java-21-ibm-semeru-certified-jdk-1:21.0.11.0.10-1.el10_0, java-21-ibm-semeru-certified-jdk-headless-1:21.0.11.0.10-1.el10_0
    • Red Hat Enterprise Linux Supplementary EUS (v.10.2) java-21-ibm-semeru-certified-jdk-1:21.0.11.0.10-2.el10_1, java-21-ibm-semeru-certified-jdk-devel-1:21.0.11.0.10-2.el10_1, java-21-ibm-semeru-certified-jdk-headless-1:21.0.11.0.10-2.el10_1 +2

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux Supplementary (v. 10)Fixed RHSA-2026:22328
Red Hat Enterprise Linux Supplementary EUS (v. 10.0)Fixed RHSA-2026:22328
Red Hat Enterprise Linux Supplementary EUS (v.10.2)Fixed RHSA-2026:22328

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-6918
  2. 2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 1

Patch 1

  • TI-2021-09396 Missing initialization of resource in Eclipse OpenJ9 CVSS 3.1MEDIUM 6.5
  • TI-2018-09008 Improper input validation in Eclipse OpenJ9 CVSS 3.0CRITICAL 9.8
  • TI-2018-09006 Improper input validation in Eclipse OpenJ9 CVSS 3.0CRITICAL 9.8
  • TI-2021-17899 In Eclipse Openj9 before version 0.29.0, the JVM does not throw IllegalAccessError for… CVSS 3.1CRITICAL 9.8
  • TI-2019-08829 Out-of-bounds write in Eclipse OpenJ9 CVSS 3.0CRITICAL 9.8
  • TI-2020-16547 Stack-based buffer overflow in Eclipse OpenJ9 CVSS 3.1CRITICAL 9.8
See all 22 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences