CVE-2026-12611

    Dashboard / Vulnerabilities / CVE-2026-12611

    CVE-2026-12611

    Published: 8 Sept 2026Last Modified: 11 Sept 2026

    Summary:

    Details: A client may issue HTTP/2 requests to a Jetty server that result in blocking writes that are never unblocked, eventually causing all threads to be blocked and the whole server to become unresponsive. This is caused by a race condition in the server when handling RST_STREAM frames and GOAWAY frames sent by the client. The race condition "resets" the HTTP2Flusher.terminated, previously set to a non-null value, to the null value, allowing entries to be enqueued in the flusher that however will never be processed. These unprocessed entries are the ones that would unblock the write-blocked threads.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12611.json, https://github.com/jetty/jetty.project/security/advisories/GHSA-gpg9-4257-cfm3, https://nvd.nist.gov/vuln/detail/CVE-2026-12611

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- c8372b65bd15404de1444d68902c0455a3a69b64
    Fixed -None

    Affected versions

    jetty-12.0.37
    jetty-12.0.31
    jetty-12.0.30
    jetty-12.0.23
    jetty-12.0.22
    jetty-12.0.19
    jetty-12.0.15
    jetty-12.0.14
    jetty-12.0.6
    jetty-12.0.5
    jetty-12.0.0x

    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
    CVE-2026-12611 | CVE-DB