CVE-2026-12198: Microweber/microweber Path Traversal Vulnerability

MODERATE
Advisory Identifier: GHSA-vv4x-qcpq-wgrg
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CVSS 7.3
CWE-22
Published
Advisory Summary

CVE-2026-12198 is a MODERATE (CVSS 7.3) path traversal vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Microweber/microweber libraries in the Packagist ecosystem. The issue involves microweber vulnerable to path traversal. Remediation is available in the latest vendor maintenance releases.

CVE-2026-12198 at a Glance

CVE Identifier CVE-2026-12198
GHSA Identifier GHSA-vv4x-qcpq-wgrg
Severity MODERATE
CVSS v3.1 Base Score 7.3
CWE Classification CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Product Microweber/microweber
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 7.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-12198

To remediate this vulnerability, upgrade all affected Microweber/microweber dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

microweber/microweber fixed: Latest secure release 
Upgrade microweber/microweber to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for microweber/microweber

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-12198, inspect your project dependencies for Microweber/microweber:

inspect dependencies for microweber/microweber

Analyze the terminal output to locate any version of Microweber/microweber in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Microweber/microweber, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A weakness has been identified in Microweber up to 2.0.20. This affects the function userfiles_path of the file /api_nosession/thumbnail_img of the component API Endpoint. Executing a manipulation of the argument cache_path_relative can lead to path traversal. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CVE-2026-12198 Affected Microweber/microweber Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
microweber/microweber
 Packagist
≤ 2.0.20

References

NVD — CVE-2026-12198 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12198
Microweber/microweber Source Repository REPOSITORY
https://github.com/microweber/microweber/issues/1172
Microweber/microweber Source Repository REPOSITORY
https://github.com/microweber/microweber
Microweber/microweber Source Repository REPOSITORY
https://github.com/whuHouYF/microweber-vuldb-disclosure-2026/blob/991630c494a99c70a96e456992a04de2ecb5a1e1/reports/microweber-path-traversal.md
vuldb.com/cve/cve-2026-12198 WEB
https://vuldb.com/cve/CVE-2026-12198
vuldb.com/submit/829596 WEB
https://vuldb.com/submit/829596
vuldb.com/vuln/370841 WEB
https://vuldb.com/vuln/370841
vuldb.com/vuln/370841/cti WEB
https://vuldb.com/vuln/370841/cti

Frequently Asked Questions

What is CVE-2026-12198?
CVE-2026-12198 is a security vulnerability in Microweber/microweber involving Microweber vulnerable to Path Traversal under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal').
Which Microweber/microweber versions are affected?
Affected versions include releases prior to current release patches across affected packages: microweber/microweber.
What version fixes CVE-2026-12198?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is microweber/microweber affected?
Yes, microweber/microweber is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-12198?
CVE-2026-12198 has a CVSS v3.1 base score of 7.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-12198?
CVE-2026-12198 is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.).
How can I check Packagist dependencies for CVE-2026-12198?
Run the dependency tree command: 'inspect dependencies for microweber/microweber'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-vv4x-qcpq-wgrg",
  "modified" : "2026-08-25T17:43:26Z",
  "published" : "2026-06-15T00:31:50Z",
  "aliases" : [ "CVE-2026-12198" ],
  "summary" : "Microweber vulnerable to Path Traversal",
  "details" : "A weakness has been identified in Microweber up to 2.0.20. This affects the function userfiles_path of the file /api_nosession/thumbnail_img of the component API Endpoint. Executing a manipulation of the argument cache_path_relative can lead to path traversal. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "microweber/microweber"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.0.20"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-12198"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/microweber/microweber/issues/1172"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/microweber/microweber"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/whuHouYF/microweber-vuldb-disclosure-2026/blob/991630c494a99c70a96e456992a04de2ecb5a1e1/reports/microweber-path-traversal.md"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/cve/CVE-2026-12198"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/submit/829596"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/370841"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/370841/cti"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-25T17:43:26Z",
    "nvd_published_at" : "2026-06-15T00:16:43Z"
  }
}