CVE-2026-6918
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of service disruption.
- Exploit odds
- 0.5% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Details
- Published
- Last modified
- Exploit probability
- 0.5% · EPSS, next 30 days
- Weakness
- CWE-125 · Out-of-bounds read
- Record status
- Modified
Affected
- Eclipse openj9 < 0.59.0
Attack profile CVSS 4.0 · 8.7
- Attack vector
- Network
- Complexity
- Low
- Attack requirements
- None
- Privileges needed
- None
- User interaction
- None
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Fix and advisories
- https://github.com/eclipse-openj9/openj9/pull/23793
- https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-q393-vr4c-969r
- https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-q393-vr4c-969r
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
- https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-q393-vr4c-969r
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6918.json