How severe is CVE-2026-28223?

CVE-2026-28223 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2026-28223?

CVE-2026-28223 affects the following packages: wagtail (PyPI), wagtail (PyPI), wagtail (PyPI), wagtail (PyPI). Ecosystems affected: PyPI.

How do I fix CVE-2026-28223?

Update wagtail to 6.3.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-28223 is resolved across your whole dependency graph.

How do I detect CVE-2026-28223 in my PyPI dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for wagtail, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-28223 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2026-28223 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-28223 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-28223?

CVE-2026-28223 has an EPSS (Exploit Prediction Scoring System) score of 0.5%, placing it in the 45th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-28223?

CVE-2026-28223 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2026-28223 published, and has it been updated?

CVE-2026-28223 was published on March 5, 2026 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍

🐍 PyPI

Not in CISA KEV

MEDIUM severity

CVE-2026-28223 — wagtail

MEDIUMFix: wagtail/wagtail@1c6f2ef

CVE-2026-28223 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in wagtail. A fix is available for wagtail — see the affected versions and patch details below.

Wagtail: Improper escaping of HTML (Cross-site Scripting) in simple_translation admin interface

Also known asGHSA-p4v8-rw59-93cqPYSEC-2026-2308

Published

Mar 5, 2026

Updated

Oct 28, 2026

Affected

4 pkgs

Patched

4 / 4

Exploits

None indexed

Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

A successful exploit gives an attacker total control of the affected component, not partial access.
CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-28223.

EPSS Exploitation Probability

via FIRST.org ↗

0.5%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs45th percentile — riskier than 45% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

4 pkgs affected

🐍wagtail🐍wagtail🐍wagtail🐍wagtail

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

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
Email Wagtail at [email protected] (view the security policy for more information).

Affected Packages

4 total 4 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`wagtail`	all versions	6.3.8`pip install --upgrade 'wagtail==6.3.8'`
🐍PyPI	`wagtail`	≥ 6.4rc1&&< 7.0.6	7.0.6`pip install --upgrade 'wagtail==7.0.6'`
🐍PyPI	`wagtail`	≥ 7.1rc1&&< 7.2.3	7.2.3`pip install --upgrade 'wagtail==7.2.3'`
🐍PyPI	`wagtail`	≥ 7.3rc1&&< 7.3.1	7.3.1`pip install --upgrade 'wagtail==7.3.1'`

Affected Products

1 product · 5 configurations

Application

wagtailtorchbox

≥ 7.1 && < 7.2.3

1 version

7.3

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for wagtail, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update wagtail to 6.3.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-28223 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

### 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.