CVE-2021-43795

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    CVE-2021-43795

    Published: 2 Dec 2021Last Modified: 9 Oct 2026

    Summary:

    Details: Armeria is an open source microservice framework. In affected versions an attacker can access an Armeria server's local file system beyond its restricted directory by sending an HTTP request whose path contains `%2F` (encoded `/`), such as `/files/..%2Fsecrets.txt`, bypassing Armeria's path validation logic. Armeria 1.13.4 or above contains the hardened path validation logic that handles `%2F` properly. This vulnerability can be worked around by inserting a decorator that performs an additional validation on the request path.

    References: https://github.com/line/armeria/pull/3855, https://github.com/line/armeria/security/advisories/GHSA-8fp4-rp6c-5gcv, https://github.com/line/armeria/commit/e2697a575e9df6692b423e02d731f293c1313284

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -e2697a575e9df6692b423e02d731f293c1313284

    Affected versions

    armeria-0.27.0.Final

    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