Missing Authorization in Semantic MediaWiki Allows Unauthorized Updates
CVE-2026-116879

6.9MEDIUM

Key Information:

Vendor

Semanticmediawiki

Status
Semanticmediawiki
Vendor
CVE Published:
27 October 2026

What is CVE-2026-116879?

Semantic MediaWiki versions prior to 7.3.1 are susceptible to a missing authorization vulnerability within the smwtask update task. This flaw enables users with edit rights to execute forced semantic updates on pages that should be restricted. Attackers can exploit this vulnerability by submitting a serialized subject parameter to trigger reparsing and resource-intensive operations, posing significant risks to the integrity of the media and creating service disruptions.

Affected Version(s)

SemanticMediaWiki 7.3.0 < 7.3.1

SemanticMediaWiki 7.3.1

References

https://github.com/SemanticMediaWiki/SemanticMediaWiki/se...
vendor-advisory
https://github.com/SemanticMediaWiki/SemanticMediaWiki/co...
patch
https://www.vulncheck.com/advisories/semantic-mediawiki-7...
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

AlpetGexha
.