VYPR

CWE-177

Improper Handling of URL Encoding (Hex Encoding)

VariantDraft

Description

The product does not properly handle when all or part of an input has been URL encoded.

Hierarchy (View 1000)

Parents

Children

none

Related attack patterns (CAPEC)

CAPEC-120 · CAPEC-468 · CAPEC-64 · CAPEC-72

CVEs mapped to this weakness (15)

  • CVE-2022-3782CriJan 13, 2023
    risk 0.53cvss 9.1epss 0.06

    keycloak: path traversal via double URL encoding. A flaw was found in Keycloak, where it does not properly validate URLs included in a redirect. An attacker can use this flaw to construct a malicious request to bypass validation and access other URLs and potentially sensitive…

  • CVE-2025-29847HigJan 19, 2026
    risk 0.49cvss 7.5epss 0.01

    A vulnerability in Apache Linkis. Problem Description When using the JDBC engine and da When using the JDBC engine and data source functionality, if the URL parameter configured on the frontend has undergone multiple rounds of URL encoding, it may bypass the system's checks.…

  • CVE-2022-27780HigJun 2, 2022
    risk 0.49cvss 7.5epss 0.02

    The curl URL parser wrongly accepts percent-encoded URL separators like '/'when decoding the host name part of a URL, making it a *different* URL usingthe wrong host name when it is later retrieved.For example, a URL like `http://example.com%2F127.0.0.1/`, would be allowed bythe…

  • CVE-2026-22037HigJan 19, 2026
    risk 0.48cvss 8.4epss 0.00

    The @fastify/express plugin adds full Express compatibility to Fastify. A security vulnerability exists in @fastify/express prior to version 4.0.3 where middleware registered with a specific path prefix can be bypassed using URL-encoded characters (e.g., `/%61dmin` instead of…

  • CVE-2026-22031HigJan 19, 2026
    risk 0.48cvss 8.4epss 0.00

    @fastify/middie is the plugin that adds middleware support on steroids to Fastify. A security vulnerability exists in @fastify/middie prior to version 9.1.0 where middleware registered with a specific path prefix can be bypassed using URL-encoded characters (e.g., `/%61dmin`…

  • CVE-2026-29045HigMar 4, 2026
    risk 0.42cvss 7.5epss 0.00

    Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when using serveStatic together with route-based middleware protections (e.g. app.use('/admin/*', ...)), inconsistent URL decoding allowed protected static resources to…

  • CVE-2022-3854MedMar 6, 2023
    risk 0.42cvss 6.5epss 0.01

    A flaw was found in Ceph, relating to the URL processing on RGW backends. An attacker can exploit the URL processing by providing a null URL to crash the RGW, causing a denial of service.

  • CVE-2024-23983MedNov 11, 2024
    risk 0.38cvss epss 0.00

    Improper handling of canonical URL-encoding may lead to bypass not properly constrained by request rules.

  • CVE-2018-3718MedJun 7, 2018
    risk 0.35cvss 5.3epss 0.01

    serve node module suffers from Improper Handling of URL Encoding by permitting access to ignored files if a filename is URL encoded.

  • CVE-2024-48866MedDec 6, 2024
    risk 0.34cvss 5.3epss 0.00

    An improper handling of URL encoding (Hex Encoding) vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers to run the system into unexpected state. We have already fixed the vulnerability in…

  • CVE-2026-6414MedApr 16, 2026
    risk 0.31cvss 5.9epss 0.00

    @fastify/static versions 8.0.0 through 9.1.0 decode percent-encoded path separators (%2F) before filesystem resolution, while Fastify's router treats them as literal characters. This mismatch allows attackers to bypass route-based middleware or guards that protect files served…

  • CVE-2023-47106MedDec 4, 2023
    risk 0.24cvss 4.8epss 0.01

    Traefik is an open source HTTP reverse proxy and load balancer. When a request is sent to Traefik with a URL fragment, Traefik automatically URL encodes and forwards the fragment to the backend server. This violates RFC 7230 because in the origin-form the URL should only contain…

  • CVE-2025-11990LowNov 15, 2025
    risk 0.20cvss 3.1epss 0.00

    GitLab has remediated an issue in GitLab EE affecting all versions from 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated user to gain CSRF tokens by exploiting improper input validation in repository references combined with redirect handling…

  • CVE-2026-59083CriJul 14, 2026
    risk 0.00cvss 9.1epss 0.00

    Improper Handling of URL Encoding (Hex Encoding) vulnerability in Apache Tomcat's rewrite valve allowed security constraint bypass for some configurations. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.56, from 9.0.0.M1 through…

  • CVE-2026-41041CriJul 13, 2026
    risk 0.00cvss 9.1epss 0.00

    URL path injection via unencoded user-supplied identifiers vulnerability in Apache Gravitino. This issue affects Apache Gravitino: from 1.0.0 before 1.2.1. Users are recommended to upgrade to version 1.2.1, which fixes the issue.