CVE-2019-9901

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    CVE-2019-9901

    Published: 25 Apr 2019Last Modified: 7 Aug 2026

    Summary:

    Details: Envoy 1.9.0 and before does not normalize HTTP URL paths. A remote attacker may craft a relative path, e.g., something/../admin, to bypass access control, e.g., a block on /admin. A backend server could then interpret the non-normalized path and provide an attacker access beyond the scope provided for by the access control policy.

    References: https://groups.google.com/forum/#%21topic/envoy-announce/VoHfnDqZiAM, https://github.com/envoyproxy/envoy/security/advisories/GHSA-xcx5-93pw-jw2w, https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history, https://github.com/envoyproxy/envoy/issues/6435

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    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