Medium severity · published Oct 27, 2026
CVE-2026-116877
Semantic MediaWiki 2.5.0 before 7.3.1 Resource Exhaustion via #set_recurring_event
New
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
Semantic MediaWiki from 2.5.0 before 7.3.1 contains an uncontrolled resource consumption vulnerability that allows low-privilege editors to bypass smwgMaxNumRecurringEvents by supplying a large limit parameter. Attackers can save pages using #set_recurring_event without an end date to generate thousands or millions of date subobjects, exhausting CPU, memory, and database resources.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
SemanticMediaWiki · SemanticMediaWiki
2.5.0 before 7.3.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116877
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116877
github.com
https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/215599f0fc03274fd4cee9ba0f7162f5a38c031b
github.com
https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-vxrm-2g9f-2vqh
www.vulncheck.com
https://www.vulncheck.com/advisories/semantic-mediawiki-2.5.0-before-7.3.1-resource-exhaustion-via-set-recurring-event
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