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High 8.7Published May 5, 2026
CVE-2026-6918In Eclipse Open9J versions 0.21 to 0.58, a pre-authentication remote attacker can crash JITServer by sending a 32-byte crafted TCP message.
Updated under an hour ago ()
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It affects Eclipse Foundation Eclipse OpenJ9 and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 8.7 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-125, CWE-1286
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- eclipse
- NVD analysis
- Modified
- Record last updated
- Jul 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Eclipse Foundation Eclipse OpenJ9 eclipse_foundation:eclipse_openj9 (from the name) | from 0.21 before 0.59 | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | from 1:21.0.11.0.10-2.el10_1 not affected | CISA ADP |
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus | from 1:21.0.11.0.10-1.el10_0 not affected | CISA ADP |
eclipse openj9 eclipse:openj9 | from 0.21.0 before 0.59.0 | NVD |
References
- https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-q393-vr4c-969rexploit, vendor-advisory
- https://github.com/eclipse-openj9/openj9/pull/23793issue-tracking, patch
- 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
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6918.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.