CVE-2026-116871 Semantic MediaWiki - Denial of Service

Semantic MediaWiki < 7.3.1 contains a denial of service caused by uncontrolled recursion in LegacyParser::getSubqueryDescription processing nested query tokens before depth limits, letting unauthenticated attackers exhaust CPU and memory via action=ask API.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.37% 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-674

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

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