CVE-2026-6918

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.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-26)

CWEs

CWE-125, CWE-1286

Published

2026-05-05

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• eclipse:openj9

References

• https://github.com/eclipse-openj9/openj9/pull/23793
• https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-q393-vr4c-969r
• https://access.redhat.com/errata/RHSA-2026:22328
• https://access.redhat.com/security/cve/CVE-2026-6918
• https://bugzilla.redhat.com/show_bug.cgi?id=2466741

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