CVE-2026-116878 Semantic MediaWiki - Denial of Service

Semantic MediaWiki > 2.5.0 and < 7.3.1 contains an uncontrolled resource consumption vulnerability caused by supplying a zero limit to Special:PropertyLabelSimilarity, letting anonymous attackers exhaust CPU, memory, and database connections by triggering quadratic computations, exploit requires no authentication.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.36% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
27 October 2026
Updated
29 October 2026
Weakness
CWE-400

Vendor fix

Upgrade to version 7.3.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs