CVE-2026-55630: Kiwitcms Security Vulnerability Vulnerability

LOW
Advisory Identifier: GHSA-473p-56xx-vg67
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CVSS 0.0
CWE-79
Published
Advisory Summary

CVE-2026-55630 is a LOW (CVSS 0.0) security vulnerability vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Kiwitcms libraries in the PyPI ecosystem. The issue involves uri in extra_link field (testplan & testcase). Remediation is available in the latest vendor maintenance releases.

CVE-2026-55630 at a Glance

CVE Identifier CVE-2026-55630
GHSA Identifier GHSA-473p-56xx-vg67
Severity LOW
CVSS v3.1 Base Score 0.0
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Kiwitcms
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 0.0

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:R/S:U/C:N/I:N/A:N).

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

How to Fix CVE-2026-55630

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

kiwitcms fixed: Latest secure release 
pip install kiwitcms>=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: 

pip show kiwitcms

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-55630, inspect your installed packages using pip:

pip show kiwitcms

Analyze the terminal output to locate any version of Kiwitcms 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: The pip show kiwitcms command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In Kiwitcms, 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

## Summary In Kiwi TCMS the fields `TestCase.extra_link` and `TestPlan.extra_link` were meant to represent URLs to external resources however in versions prior to 16.1 user input was not being sanitized and values were rendered verbatim which represents an opportunity for cross-site scripting exploitation. In version 16.1 these fields are properly sanitized and existing database records which don't validate will be reset to a null value. ## Impact Deployments which use the official Docker images and/or unmodified Kiwi TCMS middleware send a `Content-Security-Policy` header which makes this vulnerability difficult to exploit in practice because this header blocks the browser from executing inline JavaScript. Customized deployments which modify the default security settings may still be vulnerable.

CVE-2026-55630 Affected Kiwitcms Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
kiwitcms
pypi/kiwitcms
PyPI
≤ 12.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/kiwitcms/Kiwi/security/advisories/GHSA-473p-56xx-vg67
Kiwitcms Source Repository REPOSITORY
https://github.com/kiwitcms/Kiwi
Kiwitcms Release RELEASE
https://github.com/kiwitcms/Kiwi/releases/tag/v16.1
Kiwitcms Security Information SECURITY
https://kiwitcms.org/blog/kiwi-tcms-team/2026/06/24/kiwi-tcms-161

Frequently Asked Questions

What is CVE-2026-55630?
CVE-2026-55630 is a security vulnerability in Kiwitcms involving URI in extra_link field (TestPlan & TestCase) under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Kiwitcms versions are affected?
Affected versions include releases prior to current release patches across affected packages: kiwitcms.
What version fixes CVE-2026-55630?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is kiwitcms affected?
Yes, kiwitcms 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-2026-55630?
CVE-2026-55630 has a CVSS v3.1 base score of 0.0 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:N.
What CWE is associated with CVE-2026-55630?
CVE-2026-55630 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check PyPI dependencies for CVE-2026-55630?
Run the dependency tree command: 'pip show kiwitcms'. 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-473p-56xx-vg67",
  "modified" : "2026-07-06T21:49:41Z",
  "published" : "2026-07-06T21:49:41Z",
  "aliases" : [ "CVE-2026-55630" ],
  "summary" : "Kiwi TCMS vulnerable to stored XSS via JavaScript: URI in extra_link field (TestPlan & TestCase)",
  "details" : "## Summary\n\nIn Kiwi TCMS the fields `TestCase.extra_link` and `TestPlan.extra_link` were meant to represent URLs to external resources however in versions prior to 16.1 user input was not being sanitized and values were rendered verbatim which represents an opportunity for cross-site scripting exploitation. In version 16.1 these fields are properly sanitized and existing database records which don't validate will be reset to a null value.\n\n\n## Impact\n\nDeployments which use the official Docker images and/or unmodified Kiwi TCMS middleware send a `Content-Security-Policy` header which makes this vulnerability difficult to exploit in practice because this header blocks the browser from executing inline JavaScript. Customized deployments which modify the default security settings may still be vulnerable.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "kiwitcms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "12.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/kiwitcms/Kiwi/security/advisories/GHSA-473p-56xx-vg67"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kiwitcms/Kiwi"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kiwitcms/Kiwi/releases/tag/v16.1"
  }, {
    "type" : "WEB",
    "url" : "https://kiwitcms.org/blog/kiwi-tcms-team/2026/06/24/kiwi-tcms-161"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-06T21:49:41Z",
    "nvd_published_at" : null
  }
}