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    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.

    Published:May 5, 2026
    Last Modified:May 5, 2026
    EPS:May 5, 2026
    EPSS Score:
    CVSS Score:7.5

    Affected Products

    Vendor
    Eclipse
    Product
    Openj9

    Exploits

    https://github.com/eclipse-openj9/openj9/security/advisories/GHSA-q393-vr4c-969rhttps://github.com/eclipse-openj9/openj9/security/advisories/GHSA-q393-vr4c-969r

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

    Related CVEs

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    CVE-2026-16439 (CVSS 5.8) — In Eclipse OpenJ9 versions up to 0.60, using -Xtrace to trace method arguments can lead to buffer underflow.…
    CVE-2025-4447 (CVSS 7) — In Eclipse OpenJ9 versions up to 0.51, when used with OpenJDK version 8 a stack based buffer overflow can be c…
    CVE-2024-10917 (CVSS 3.7) — In Eclipse OpenJ9 versions up to 0.47, the JNI function GetStringUTFLength may return an incorrect value which…
    CVE-2024-3933 (CVSS 5.3) — In Eclipse OpenJ9 release versions prior to 0.44.0 and after 0.13.0, when running with JVM option -Xgc:concurr…
    CVE-2023-5676 (CVSS 4.1) — In Eclipse OpenJ9 before version 0.41.0, the JVM can be forced into an infinite busy hang on a spinlock or a s…
    CVE-2023-2597 (CVSS 7) — In Eclipse Openj9 before version 0.38.0, in the implementation of the shared cache (which is enabled by defaul…
    CVE-2022-3676 (CVSS 6.5) — In Eclipse Openj9 before version 0.35.0, interface calls can be inlined without a runtime type check. Maliciou…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High