Vulnerability · Published May 5, 2026 · Assigned by eclipse
CVE-2026-6918
High 7.5
In plain English
A high-severity out-of-bounds read in Eclipse OpenJ9 from Eclipse Foundation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 55.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Eclipse Foundation | Eclipse OpenJ9 | 0.21 – before 0.59 |
Weakness: CWE-125, CWE-1286 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-q393-vr4c-969r
- https://github.com/eclipse-openj9/openj9/pull/23793
- https://access.redhat.com/security/cve/CVE-2026-6918 vdb-entry, x_refsource_REDHAT
- RHBZ#2466741 issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6918.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:22328 vendor-advisory, x_refsource_REDHAT