VulnerabilityModified
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.
HIGH 8.7EPSS 0.52%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.52%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 4.0
- 8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.52% probability · 42th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125, CWE-1286
- Affected
- eclipse/openj9
- Source
- emo@eclipse.org
References
- https://github.com/eclipse-openj9/openj9/pull/23793Issue Tracking, Patch
- https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-q393-vr4c-969rExploit, Vendor Advisory
- 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://github.com/eclipse-openj9/openj9/security/advisories/GHSA-q393-vr4c-969rExploit, Vendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6918.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.