CVE-2026-126560 Semantic MediaWiki 3.0.0 before 7.4.1 Stored XSS via data-search Attributes
Users with edit rights can store script in Semantic MediaWiki DataTables attributes that runs in viewers' browsers, including administrators.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Harmful if only installed
- No
- Needs a specific call
- No
- Fix
- None listed
What is CVE-2026-126560?
CVE-2026-126560 is a medium-severity cross-site scripting vulnerability in SemanticMediaWiki, published on 11 Nov 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Semantic MediaWiki 3.0.0 before 7.4.1 contains a stored cross-site scripting vulnerability in the DataTables integration that initialises author-written smw-datatable tables unchanged. Users with page-edit rights can add HTML entity-encoded markup in data-search or data-filter cell attributes, executing script in viewers' browsers including administrators.
Weakness: CWE-79
Which versions are affected by CVE-2026-126560?
An affected version is exposed as installed. No special setting or call is needed.
How do I fix CVE-2026-126560?
No fix has been published for CVE-2026-126560 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-2026-126560 being exploited?
There is no known exploitation of CVE-2026-126560 in the wild and no public exploit code.
Sources
Also known as GHSA-cqj6-mhrj-q9qw, GHSA-gg2q-rc52-22pp.