# CVE-2026-96875: MediaWiki Cargo extension stored cross-site scripting

Source: https://junglewise.ai/threats/cve-2026-96875-improper-neutralization-of-input-during-web-page-generation-cross  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-25. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-96875 · Severity: info · Published 2026-09-25

The Cargo extension for MediaWiki, which manages structured data in wiki pages, contains a stored cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts. An attacker who can add or edit wiki page content could inject code that executes in the browsers of other users viewing that page, potentially stealing session cookies, credentials, or performing unauthorized actions on their behalf.

Vendors: [Wikimedia](https://junglewise.ai/threats/vendors/wikimedia).

## Quick answers

**Is CVE-2026-96875 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-96875 being exploited in the wild.

**How severe is CVE-2026-96875?** Informational severity, published 25 September 2026.

**Which products and versions are affected?** Wikimedia Cargo through 3.9.4.

**Is there a fix for CVE-2026-96875?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-96875 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-96875?** Check whether you run Wikimedia Cargo at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an improper neutralization of user input during web page generation in the Cargo extension, allowing stored XSS injection through wiki page content or data parameters. The flaw affects versions through 3.9.4 and requires the ability to edit wiki pages or submit data that Cargo processes. An authenticated or unauthenticated attacker (depending on wiki permissions) can inject persistent malicious JavaScript that executes for all users viewing the affected page.

## Affected products

- Wikimedia Cargo through 3.9.4

## Timeline

- 2026-09-25: disclosed

## References

- [https://phabricator.wikimedia.org/T435206](https://phabricator.wikimedia.org/T435206)

## Related threats

- [MediaWiki Cargo extension stored cross-site scripting](https://junglewise.ai/threats/cve-2026-96874-improper-neutralization-of-input-during-web-page-generation-cross)