PYSEC-2026-1489

    Dashboard / Vulnerabilities / PYSEC-2026-1489

    PYSEC-2026-1489

    Published: 7 Jul 2026Last Modified: 7 Jul 2026

    Summary: Keylime's registrar vulnerable to Denial-of-service attack via a single open connection

    Details: ### Impact Keylime `registrar` is prone to a simple denial of service attack in which an adversary opens a connection to the TLS port (by default, port `8891`) blocking further, legitimate connections. As long as the connection is open, the `registrar` is blocked and cannot serve any further clients (`agents` and `tenants`), which prevents normal operation. The problem does not affect the `verifier`. ### Patches Users should upgrade to release 7.4.0

    References: https://github.com/keylime/keylime/security/advisories/GHSA-pg75-v6fp-8q59, https://nvd.nist.gov/vuln/detail/CVE-2023-38200, https://github.com/keylime/keylime/pull/1421, https://github.com/keylime/keylime/commit/c68d8f0b7ea549c12b6956ab0f3c28ae0360ae17, https://access.redhat.com/security/cve/CVE-2023-38200, https://bugzilla.redhat.com/show_bug.cgi?id=2222692, https://github.com/keylime/keylime, https://github.com/keylime/keylime/releases/tag/v7.4.0, https://pypi.org/project/keylime, https://github.com/advisories/GHSA-pg75-v6fp-8q59

    Affected packages

    Package

    Name: keylime

    Purl: pkg:pypi/keylime

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -7.4.0

    Affected versions

    6.3.1
    6.3.2

    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
    PYSEC-2026-1489 | CVE-DB