CVE-2026-6918 — HIGH (7.5) — White Hats Nepal

Q: What is CVE-2026-6918?

CVE-2026-6918 is a vulnerability with a CVSS score of 7.5 (HIGH). 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.

Q: How severe is CVE-2026-6918?

CVE-2026-6918 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-6918?

Check the references section above for vendor advisories and patch information. Affected products include: Eclipse Openj9.

Vulnerability 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 Score

7.5

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Eclipse	Openj9	>= 0.21.0, < 0.59.0

Related Weaknesses (CWE)

CWE-125

References

https://github.com/eclipse-openj9/openj9/pull/23793Issue TrackingPatch
https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-q393-vr4c-969rExploitVendor Advisory
https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-q393-vr4c-969rExploitVendor Advisory

FAQ

What is CVE-2026-6918?

CVE-2026-6918 is a vulnerability with a CVSS score of 7.5 (HIGH). 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.

How severe is CVE-2026-6918?

CVE-2026-6918 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-6918?

Check the references section above for vendor advisories and patch information. Affected products include: Eclipse Openj9.