CVE-2026-96878 Cargo Exhibit field alias allows stored XSS
Attackers can inject malicious scripts via field aliases in the MediaWiki Cargo extension, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-96878?
CVE-2026-96878 is a medium-severity cross-site scripting vulnerability in The Wikimedia Foundation Mediawiki - Cargo extension, published on 25 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Mediawiki - Cargo extension allows Reflected XSS.
This issue affects Mediawiki - Cargo extension: through 3.9.4.
Weakness: CWE-79
Which versions are affected by CVE-2026-96878?
How do I fix CVE-2026-96878?
No fix has been published for CVE-2026-96878 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-96878 being exploited?
There is no known exploitation of CVE-2026-96878 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-gxr4-xfc8-mcrv.