CVE-2025-62820

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    CVE-2025-62820

    Published: 23 Oct 2025Last Modified: 10 Oct 2026

    Summary:

    Details: Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62820.json, https://nvd.nist.gov/vuln/detail/CVE-2025-62820, https://github.com/slackhq/nebula/pull/1493, https://github.com/slackhq/nebula/pull/1494

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -7c3f5339508c7dbc74eea7f925d31b28bafa1b45

    Affected versions

    v1.9.6
    v1.9.5
    v1.9.4
    v1.9.3
    v1.9.2
    v1.9.1
    v1.9.0

    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-2025-62820 | CVE-DB