Vulnerability · Published Oct 27, 2026 · Assigned by VulnCheck
CVE-2026-116872Semantic MediaWiki 3.0.0 before 7.3.1 Denial of Service via Special:Search Compact Filters
High 7.5
In plain English
A high-severity security flaw in SemanticMediaWiki from SemanticMediaWiki. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).
Official description
Semantic MediaWiki from 3.0.0 before 7.3.1 contains an algorithmic complexity vulnerability in TermParser::normalize_compact_form() that allows unauthenticated attackers to cause quadratic CPU consumption. Attackers can submit long search terms with many distinct in:(...) or has:(...) expressions to Special:Search to exhaust PHP search workers when the extended search engine is enabled.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SemanticMediaWiki | SemanticMediaWiki | 3.0.0 – before 7.3.1 |
Weakness: CWE-407 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- GitHub Security Advisory (GHSA-j2r2-7qpg-p675) vendor-advisory
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/c2bf1699dec4016e21ce52613152bda799ce87d4 patch
- VulnCheck Advisory: Semantic MediaWiki 3.0.0 before 7.3.1 Denial of Service via Special:Search Compact Filters third-party-advisory