# 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.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N`)
- **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 available:** No
- **Published:** 11 Nov 2026
- **Updated:** 12 Nov 2026
- **Also known as:** GHSA-cqj6-mhrj-q9qw, GHSA-gg2q-rc52-22pp

## 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 (Improper Neutralization of Input During Web Page Generation)

## 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.

## Is CVE-2026-126560 being exploited?

There is no known exploitation of CVE-2026-126560 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-126560 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-126560 in the wild and no public exploit code.
Exposure: An affected version is exposed as installed. No special setting or call is needed.

Affected product: SemanticMediaWiki. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-126560/ (Markdown: https://insights.sbomify.com/CVE-2026-126560/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-126560
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-126560
- OSV: https://osv.dev/vulnerability/CVE-2026-126560

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-126560/
Summaries are generated and may contain mistakes; the official description above is the record.