CVE-2026-110938

JITServer: Multiple Denial of Service vulnerabilities via out-of-bounds heap reads during message and reply parsing

8.7 High

In Eclipse OpenJ9 versions up to 0.63.0, the JITServer component is vulnerable to denial of service due to improper boundary checks during protocol message and reply handling. An unauthenticated remote attacker or malicious JITServer can transmit malformed network payloads that cause out-of-bounds heap reads, immediately crashing the JITServer daemon or client JVM process via a segmentation fault (SIGSEGV).

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.41%Unchanged since Oct 21, 2026

What each source reports

CVE List Score used 8.7

JITServer: Multiple Denial of Service vulnerabilities via out-of-bounds heap reads during message and reply parsing

Record: CVE-2026-110938
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
Weakness: CWE-125, CWE-20
Updated: 2026-11-02

EUVDEUVD-2026-107139 8.7

Record: EUVD-2026-107139
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
Updated: 2026-11-02

GitHub AdvisoriesGHSA-vj95-43qj-j5mf 8.7

In Eclipse OpenJ9 versions up to 0.63.0, the JITServer component is vulnerable to denial of...

Record: GHSA-vj95-43qj-j5mf
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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness: CWE-20
Updated: 2026-11-02

NVD 8.7

Record: CVE-2026-110938
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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness: CWE-20, CWE-125
Updated: 2026-11-02

OSV 8.7

JITServer: Multiple Denial of Service vulnerabilities via out-of-bounds heap reads during message and reply parsing

Record: CVE-2026-110938
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
Weakness: CWE-125, CWE-20
Updated: 2026-11-02

Affected products

eclipse foundation openj9

History

History
Recorded	Changed	Sources
Nov 2, 2026	affected, aliases, facts
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-110938 is a high vulnerability (CVSS 8.7) in Eclipse Foundation Openj9, published October 21, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 36th percentile. No source names a fixed version.