CVE-2026-28223: Wagtail Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-p4v8-rw59-93cq
Share
CVSS 6.1
CWE-79
Published
Advisory Summary

CVE-2026-28223 is a MODERATE (CVSS 6.1) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Wagtail libraries in the PyPI ecosystem. The issue involves wagtail vulnerable to cross-site scripting in simple_translation admin interface. Remediation is available by upgrading affected packages to version 6.3.8, 7.0.6, 7.2.3, 7.3.1.

CVE-2026-28223 at a Glance

CVE Identifier CVE-2026-28223
GHSA Identifier GHSA-p4v8-rw59-93cq
Severity MODERATE
CVSS v3.1 Base Score 6.1
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Wagtail
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 6.1

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

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

How to Fix CVE-2026-28223

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

wagtail fixed: 6.3.8 
pip install wagtail>=6.3.8
wagtail fixed: 7.0.6 
pip install wagtail>=7.0.6
wagtail fixed: 7.2.3 
pip install wagtail>=7.2.3
wagtail fixed: 7.3.1 
pip install wagtail>=7.3.1
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 wagtail

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-28223, inspect your installed packages using pip:

pip show wagtail

Analyze the terminal output to locate any version of Wagtail in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.3.8), your application is affected.

Note: The pip show wagtail 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 Wagtail, 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

### Impact A stored Cross-site Scripting (XSS) vulnerability exists on confirmation messages within the `wagtail.contrib.simple_translation` module. A user with access to the Wagtail admin area may create a page with a specially-crafted title which, when another user performs the "Translate" action, causes arbitrary JavaScript code to run. This could lead to performing actions with that user's credentials. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. ### Patches Patched versions have been released as Wagtail 6.3.8, 7.0.6, 7.2.3 and 7.3.1. ### Workarounds None ### Acknowledgements Many thanks to Guan Chenxian (@GCXWLP) for reporting this issue. ### For more information If there are any questions or comments about this advisory: - Visit Wagtail's [support channels](https://docs.wagtail.io/en/stable/support.html) - Email Wagtail at [security@wagtail.org](mailto:security@wagtail.org) (view the [security policy](https://github.com/wagtail/wagtail/security/policy) for more information).

CVE-2026-28223 Affected Wagtail Versions

4 component(s)
Fixed Versions:
6.3.87.0.67.2.37.3.1
Product / Package Ecosystem Affected Versions Fixed Version
wagtail
pypi/wagtail
PyPI
< 6.3.8
6.3.8
wagtail
pypi/wagtail
PyPI
≥ 6.4rc1
< 7.0.6
7.0.6
wagtail
pypi/wagtail
PyPI
≥ 7.1rc1
< 7.2.3
7.2.3
wagtail
pypi/wagtail
PyPI
≥ 7.3rc1
< 7.3.1
7.3.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/wagtail/wagtail/security/advisories/GHSA-p4v8-rw59-93cq
NVD — CVE-2026-28223 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28223
Security Fix Commit FIX COMMIT
https://github.com/wagtail/wagtail/commit/1c6f2effed68f4ccad6fbd07987e03641505f863
Security Fix Commit FIX COMMIT
https://github.com/wagtail/wagtail/commit/ba70244d376a7b1bd180ded03e827917ff410c19
Security Fix Commit FIX COMMIT
https://github.com/wagtail/wagtail/commit/d8c5900982df8ed5938ad993aa9ff69cda50f80c
Security Fix Commit FIX COMMIT
https://github.com/wagtail/wagtail/commit/ee39d39deeb7f250fe886417b24802d7e05b1143
Wagtail Source Repository REPOSITORY
https://github.com/wagtail/wagtail
Wagtail Release RELEASE
https://github.com/wagtail/wagtail/releases/tag/v6.3.8
Wagtail Release RELEASE
https://github.com/wagtail/wagtail/releases/tag/v7.0.6
Wagtail Release RELEASE
https://github.com/wagtail/wagtail/releases/tag/v7.2.3
Wagtail Release RELEASE
https://github.com/wagtail/wagtail/releases/tag/v7.3.1

Frequently Asked Questions

What is CVE-2026-28223?
CVE-2026-28223 is a security vulnerability in Wagtail involving Wagtail Vulnerable to Cross-site Scripting in simple_translation admin interface under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Wagtail versions are affected?
Affected versions include releases prior to 6.3.8, 7.0.6, 7.2.3, 7.3.1 across affected packages: wagtail.
What version fixes CVE-2026-28223?
Upgrading to 6.3.8, 7.0.6, 7.2.3, 7.3.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is wagtail affected?
Yes, wagtail is affected in releases prior to 6.3.8, 7.0.6, 7.2.3, 7.3.1. Upgrade your dependency to 6.3.8, 7.0.6, 7.2.3, 7.3.1 or later.
What is the CVSS score of CVE-2026-28223?
CVE-2026-28223 has a CVSS v3.1 base score of 6.1 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2026-28223?
CVE-2026-28223 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-2026-28223?
Run the dependency tree command: 'pip show wagtail'. 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-p4v8-rw59-93cq",
  "modified" : "2026-03-05T22:49:05Z",
  "published" : "2026-03-03T17:59:30Z",
  "aliases" : [ "CVE-2026-28223" ],
  "summary" : " Wagtail Vulnerable to Cross-site Scripting in simple_translation admin interface",
  "details" : "### Impact\nA stored Cross-site Scripting (XSS) vulnerability exists on confirmation messages within the `wagtail.contrib.simple_translation` module. A user with access to the Wagtail admin area may create a page with a specially-crafted title which, when another user performs the \"Translate\" action, causes arbitrary JavaScript code to run. This could lead to performing actions with that user's credentials. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin.\n\n### Patches\nPatched versions have been released as Wagtail 6.3.8, 7.0.6, 7.2.3 and 7.3.1.\n\n### Workarounds\nNone\n\n### Acknowledgements\n\nMany thanks to Guan Chenxian (@GCXWLP) for reporting this issue.\n\n### For more information\n\nIf there are any questions or comments about this advisory:\n\n- Visit Wagtail's [support channels](https://docs.wagtail.io/en/stable/support.html)\n- Email Wagtail at [security@wagtail.org](mailto:security@wagtail.org) (view the [security policy](https://github.com/wagtail/wagtail/security/policy) for more information).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "wagtail"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "6.3.8"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "wagtail"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.4rc1"
      }, {
        "fixed" : "7.0.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "wagtail"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.1rc1"
      }, {
        "fixed" : "7.2.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "wagtail"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.3rc1"
      }, {
        "fixed" : "7.3.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/wagtail/wagtail/security/advisories/GHSA-p4v8-rw59-93cq"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-28223"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/wagtail/wagtail/commit/1c6f2effed68f4ccad6fbd07987e03641505f863"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/wagtail/wagtail/commit/ba70244d376a7b1bd180ded03e827917ff410c19"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/wagtail/wagtail/commit/d8c5900982df8ed5938ad993aa9ff69cda50f80c"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/wagtail/wagtail/commit/ee39d39deeb7f250fe886417b24802d7e05b1143"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/wagtail/wagtail"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/wagtail/wagtail/releases/tag/v6.3.8"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/wagtail/wagtail/releases/tag/v7.0.6"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/wagtail/wagtail/releases/tag/v7.2.3"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/wagtail/wagtail/releases/tag/v7.3.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-03T17:59:30Z",
    "nvd_published_at" : "2026-03-05T20:16:15Z"
  }
}