# CVE-2026-116873: Semantic MediaWiki missing authorization in smwtask API

Source: https://junglewise.ai/threats/cve-2026-116873-semantic-mediawiki-from-7-3-0-before-7-3-1-contains-a-missing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-116873 · Severity: high · CVSS 7.3 · Published 2026-10-27

Semantic MediaWiki is a MediaWiki extension that organizes and queries structured data within wiki pages. An unauthenticated attacker can exploit a missing authorization check in the smwtask API to run arbitrary queued jobs and force updates to any page, including administrator-protected ones, leaking page titles and exhausting server resources.

Technologies: [Semantic MediaWiki](https://junglewise.ai/threats/technologies/semantic-mediawiki). Vendors: [Semantic MediaWiki](https://junglewise.ai/threats/vendors/semantic-mediawiki).

## Quick answers

**Is CVE-2026-116873 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116873 being exploited in the wild.

**How severe is CVE-2026-116873?** High severity, with a CVSS score of 7.3, published 27 October 2026.

**Which products and versions are affected?** Semantic MediaWiki 7.3.0 before 7.3.1.

**Is there a fix for CVE-2026-116873?** Yes: fixed in 7.3.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-116873 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-116873?** Check whether you run Semantic MediaWiki at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 7.3.1

## Technical details

The smwtask API module in version 7.3.0 declares that the run-joblist, check-query, and update operations require only the "edit" right, which anonymous users hold by default in MediaWiki. An unauthenticated caller can exploit the fixed public CSRF token (+\) to invoke run-joblist with any caller-supplied job map and unlimited counts, or force a semantic store update on any page title, including sysop-protected pages, without permission checks. The vulnerability is an incomplete fix of a prior authorization issue (GHSA-jr78-w6w5-m8f8).

## Affected products

- Semantic MediaWiki Semantic MediaWiki 7.3.0 before 7.3.1

## Timeline

- 2026-09-28: disclosed
- 2026-10-27: advisory

## References

- [https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-rjqv-6r83-pg8v](https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-rjqv-6r83-pg8v)
- [https://www.vulncheck.com/advisories/semantic-mediawiki-7.3.0-missing-authorization-via-smwtask-api-run-joblist-and-update](https://www.vulncheck.com/advisories/semantic-mediawiki-7.3.0-missing-authorization-via-smwtask-api-run-joblist-and-update)

## Related threats

- [Semantic MediaWiki authorization bypass in edit protection](https://junglewise.ai/threats/cve-2026-126566-semantic-mediawiki-7-3-1-before-7-4-1-contains-an-incorrect)
- [Semantic MediaWiki denial of service in concept expansion](https://junglewise.ai/threats/cve-2026-126565-semantic-mediawiki-3-0-0-before-7-4-1-contains-a-denial-of)
- [Semantic MediaWiki stored XSS in ValueFormatter property label](https://junglewise.ai/threats/cve-2026-126564-semantic-mediawiki-2-5-0-before-7-4-1-contains-a-stored-cross)
- [Semantic MediaWiki uncontrolled recursion in ConceptDescriptionInterpreter](https://junglewise.ai/threats/cve-2026-126562-semantic-mediawiki-3-0-0-before-7-4-1-contains-an-uncontrolled)
- [Semantic MediaWiki missing authorization in page edit protection](https://junglewise.ai/threats/cve-2026-126561-semantic-mediawiki-2-5-0-before-7-4-1-contains-a-missing)