GHSA-2wmf-p7f8-w42h

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    GHSA-2wmf-p7f8-w42h

    Published: 24 May 2022Last Modified: 10 Sept 2026

    Summary: EnvoyProxy Envoy Missing HTTP URL path normalization

    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://github.com/envoyproxy/envoy/security/advisories/GHSA-xcx5-93pw-jw2w, https://nvd.nist.gov/vuln/detail/CVE-2019-9901, https://github.com/envoyproxy/envoy/issues/6435, https://github.com/envoyproxy/envoy/commit/e668e669677e52a00d99652b5a260d1cedafdfa8, https://github.com/envoyproxy/envoy, https://github.com/envoyproxy/envoy/blob/main/security/postmortems/cve-2019-9900.md, https://groups.google.com/forum/#!topic/envoy-announce/VoHfnDqZiAM, https://www.envoyproxy.io/docs/envoy/v1.9.1/intro/version_history

    Affected packages

    Package

    Name: github.com/envoyproxy/envoy

    Purl: pkg:golang/github.com/envoyproxy/envoy

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -1.9.1

    Affected versions

    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