Semantic MediaWiki 2.5.0~7.3.1 版本資源耗盡漏洞（CVE-2026-116877）曝光

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.

Impact

Affected Products

The following products are affected by CVE-2026-116877 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.

Update Semantic MediaWiki to a patched version to fix resource exhaustion.

• Update Semantic MediaWiki to version 7.3.1 or later.
• Configure smwgMaxNumRecurringEvents appropriately.
• Monitor system resources after the update.

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-116877.

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-116877 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-116877 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-116877 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2026-116877 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

• New CVE Received by [email protected]

  十月. 27, 2026

  Action	Type	Old Value	New Value
  Added	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.
  Added	CVSS V4.0		AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  Added	CVSS V3.1		AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  Added	CWE		CWE-770
  Added	Affected		New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/116xxx/CVE-2026-116877.json">CVE-2026-116877</a>
  Added	Reference		https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/215599f0fc03274fd4cee9ba0f7162f5a38c031b
  Added	Reference		https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-vxrm-2g9f-2vqh
  Added	Reference		https://www.vulncheck.com/advisories/semantic-mediawiki-2.5.0-before-7.3.1-resource-exhaustion-via-set-recurring-event

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.