CVE-2022-29188

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    CVE-2022-29188

    Published: 20 May 2022Last Modified: 12 Aug 2026

    Summary: Smokescreen SSRF via deny list bypass (square brackets) in Smokescreen

    Details: Smokescreen is an HTTP proxy. The primary use case for Smokescreen is to prevent server-side request forgery (SSRF) attacks in which external attackers leverage the behavior of applications to connect to or scan internal infrastructure. Smokescreen also offers an option to deny access to additional (e.g., external) URLs by way of a deny list. There was an issue in Smokescreen that made it possible to bypass the deny list feature by surrounding the hostname with square brackets (e.g. `[example.com]`). This only impacted the HTTP proxy functionality of Smokescreen. HTTPS requests were not impacted. Smokescreen version 0.0.4 contains a patch for this issue.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/29xxx/CVE-2022-29188.json, https://github.com/stripe/smokescreen/security/advisories/GHSA-qwrf-gfpj-qvj6, https://nvd.nist.gov/vuln/detail/CVE-2022-29188, https://github.com/stripe/smokescreen/commit/dea7b3c89df000f4072ff9866d61d78e30df6a36

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -e196cd61a007e1cdbde5579fe2dac95e7154190c

    Affected versions

    v0.0.3
    v0.0.2

    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
    CVE-2022-29188 | CVE-DB