CVE-2026-0668 VisualData extension: Regular Expression Denial of Service (ReDoS) via crafted user input
Attackers can cause service disruption in MediaWiki VisualData extension by submitting crafted input that triggers exponential regex processing.
- 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-2026-0668?
CVE-2026-0668 is a medium-severity denial of service vulnerability in Wikimedia Foundation MediaWiki - VisualData Extension, published on 7 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Inefficient Regular Expression Complexity vulnerability in Wikimedia Foundation MediaWiki - VisualData Extension allows Regular Expression Exponential Blowup.This issue affects MediaWiki - VisualData Extension: 1.45.
Weakness: CWE-1333
Which versions are affected by CVE-2026-0668?
It affects 1 product.
Products include Wikisphere Visualdata.
How do I fix CVE-2026-0668?
No fix has been published for CVE-2026-0668 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-0668 being exploited?
There is no known exploitation of CVE-2026-0668 in the wild and no public exploit code.
Sources
Also known as GHSA-6p52-pvr6-5x2c.